afdo_tools: Update update_kernel_afdo to check previous branch

When we just branch, and no profiles for the current canary branch
can be found, we should check the profiles on previous branch.

Also fix non-inclusive language in this patch.

BUG=None
TEST=kernel_afdo.json changes made locally

Change-Id: I0de00274001ee7a120c40163ab93cb35e143acdf
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/2376170
Tested-by: Tiancong Wang <tcwang@google.com>
Reviewed-by: Bob Haarman <inglorion@chromium.org>
1 file changed