Architecture-qualify perl as :any

We aren't building plugins for perl.
Signed-off-by: Simon McVittie <smcv@collabora.com>

debian/control

@@ -15,7 +15,7 @@ Build-Depends:
  libipc-run-perl,
  libglib2.0-dev,
  libjpeg62-turbo <!nocheck> | libjpeg62 (>= 6b1) <!nocheck>,
- perl,
+ perl:any,
  xsltproc,
  zlib1g <!nocheck>,
 Vcs-Git: https://gitlab.collabora.com/vivek/libcapsule.git