Change DISTRO_VERSION for tagging before large rework

Change DISTRO_VERSION for tagging before large rework

We are about to merge a larger set of updates. To preserve the state we do tag
the version of Marlin (pre v13) as 12.90.1 .

Signed-off-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>
Change-Id: I8e17e608c3a351d8fb8d98bc67b9e745d8f2f9f5
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/26777
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account