update_kernel_afdo: Skip 95 branch

Add a list of skipped chromium branches and adjust canary branch number
calculation.

BUG=None
TEST=`./update_kernel_afdo` shows 96 as canary.

Change-Id: If96711f5a0d52c128d4829e338b9b950001c6e75
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/3199488
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Denis Nikitin <denik@chromium.org>
Commit-Queue: Denis Nikitin <denik@chromium.org>
1 file changed