Linux: Update to debian jessie sysroots

tools/gn_args.py

@@ -426,12 +426,13 @@ def LinuxSysrootExists(cpu):
   # Directory that contains sysroots.
   sysroot_root = os.path.join(src_dir, 'build', 'linux')
   # CPU-specific sysroot directory names.
+  # Should match the values in build/config/sysroot.gni.
   if cpu == 'x86':
-    sysroot_name = 'debian_wheezy_i386-sysroot'
+    sysroot_name = 'debian_jessie_i386-sysroot'
   elif cpu == 'x64':
-    sysroot_name = 'debian_wheezy_amd64-sysroot'
+    sysroot_name = 'debian_jessie_amd64-sysroot'
   elif cpu == 'arm':
-    sysroot_name = 'debian_wheezy_arm-sysroot'
+    sysroot_name = 'debian_jessie_arm-sysroot'
   else:
     raise Exception('Unrecognized sysroot CPU: %s' % cpu)