Remove usage of AGL_APP_REVISION
The floating AGL_APP_REVISION leads to more rebuilds than necessary.
Replace it with a fixed SRCREV. This is recommended by upstream YP.
Bug-AGL: SPEC-4481
Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Change-Id: Iea6a21720b920c5886c933c4ebc81856416368aa
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/27783
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account