libs: gobject-introspection scanner doesn't need to scan or update plugin info

Make sure the scanner doesn't load or introspect or check any plugins,
(especially not outside the build directory).

gst-libs/gst/app/Makefile.am

@@ -41,6 +41,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/app/%',$(libgstapp_@GST_MAJORMINOR@i
 
 GstApp-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstapp-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstApp \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/audio/Makefile.am

@@ -69,6 +69,7 @@ gir_cincludes+=$(patsubst %,--c-include='gst/audio/%',$(nodist_libgstaudio_@GST_
 
 GstAudio-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstaudio-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstAudio \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/cdda/Makefile.am

@@ -24,6 +24,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/cdda/%',$(libgstcdda_@GST_MAJORMINOR
 
 GstCdda-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstcdda-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstCdda \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/fft/Makefile.am

@@ -53,6 +53,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/fft/%',$(libgstfft_@GST_MAJORMINOR@_
 
 GstFft-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstfft-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstFft \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/interfaces/Makefile.am

@@ -82,6 +82,7 @@ gir_cincludes+=$(patsubst %,--c-include='gst/interfaces/%',$(nodist_libgstinterf
 
 GstInterfaces-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstinterfaces-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstInterfaces \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/netbuffer/Makefile.am

@@ -18,6 +18,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/netbuffer/%',$(libgstnetbufferinclud
 
 GstNetbuffer-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstnetbuffer-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstNetbuffer \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/pbutils/Makefile.am

@@ -76,6 +76,7 @@ gir_cincludes+=$(patsubst %,--c-include='gst/pbutils/%',$(nodist_libgstpbutils_@
 
 GstPbutils-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstpbutils-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstPbutils \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/riff/Makefile.am

@@ -28,6 +28,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/riff/%',$(libgstriff_@GST_MAJORMINOR
 
 GstRiff-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstriff-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstRiff \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/rtp/Makefile.am

@@ -29,6 +29,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/rtp/%',$(libgstrtpinclude_HEADERS))
 
 GstRtp-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstrtp-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstRtp \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/rtsp/Makefile.am

@@ -61,6 +61,7 @@ gir_cincludes+=$(patsubst %,--c-include='gst/rtsp/%',$(nodist_libgstrtspinclude_
 
 GstRtsp-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstrtsp-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstRtsp \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/sdp/Makefile.am

@@ -20,6 +20,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/sdp/%',$(libgstsdpinclude_HEADERS))
 
 GstSdp-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstsdp-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstSdp \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/tag/Makefile.am

@@ -27,6 +27,7 @@ gir_cincludes=$(patsubst %,--c-include='gst/tag/%',$(libgsttaginclude_HEADERS))
 
 GstTag-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgsttag-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstTag \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \

gst-libs/gst/video/Makefile.am

@@ -39,6 +39,7 @@ gir_cincludes+=$(patsubst %,--c-include='gst/video/%',$(nodist_libgstvideo_@GST_
 
 GstVideo-@GST_MAJORMINOR@.gir: $(INTROSPECTION_SCANNER) libgstvideo-@GST_MAJORMINOR@.la
 	$(AM_V_GEN)PKG_CONFIG_PATH="$(GST_PKG_CONFIG_PATH)" \
+		GST_PLUGIN_SYSTEM_PATH="" GST_PLUGIN_PATH="" GST_REGISTRY_UPDATE=no \
 		$(INTROSPECTION_SCANNER) -v --namespace GstVideo \
 		--nsversion=@GST_MAJORMINOR@ \
 		--strip-prefix=Gst \