sign_android_image: use ARCVM file context if needed

Apparently the file android_file_contexts has a different name for ARCVM
with _vm suffix.  Choose _vm if the container one is not found.

BUG=b:161828692
TEST=sign_official_build.sh base recovery_image.bin mykey signed.bin
BRANCH=none

Signed-off-by: Victor Hsieh <victorhsieh@chromium.org>
Change-Id: I8a93d8e1dd5b824f319d7de804f8f74825166a97
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2323647
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed