dual-image: Always create os-release symlink

Create os-release symlink in processBMCImage() so that the functional
image is always available.

Without this change, processBMCImage() will find the alt image first, and
skip checking the os-release file in the running image. This results in
the missing DBus object for the running image.

Tested: Verify the two objects are created for BMC running and alt
        images.

Signed-off-by: Lei YU <yulei.sh@bytedance.com>
Change-Id: I07e9df4ad07ede36b13a8f447618b569ec446b86
1 file changed