Pass ARC release info to cros_set_lsb_release.

cros_set_lsb_release will use the flag to embed ARC release
info to /etc/lsb-release.

CQ-DEPEND=CL:433679,CL:*321325
BUG=b:34693882
TEST=build_image and look at /etc/lsb-release

Change-Id: If52b395685fb19225386956518bf721b655a136f
Reviewed-on: https://chromium-review.googlesource.com/433997
Commit-Ready: Shuhei Takahashi <nya@chromium.org>
Tested-by: Shuhei Takahashi <nya@chromium.org>
Reviewed-by: Elijah Taylor <elijahtaylor@chromium.org>
1 file changed