Update bbe machine template for kirkstone

Update bbe machine template for kirkstone

The meta-ti layer has now been split into two sub-layers so we need to
update BBLAYERS.

Signed-off-by: Paul Barker <paul.barker@sancloud.com>
Change-Id: Iacb6940d55cb4c8dc60b3caae124cd2cd3295abe
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/c/AGL/meta-agl/+/28042
Tested-by: Jenkins Job builder account
ci-image-build: Jenkins Job builder account
ci-image-boot-test: Jenkins Job builder account
Reviewed-by: Jan-Simon Moeller <jsmoeller@linuxfoundation.org>