Add caroline bmpblk config

I know this is the wrong res, but I want to unsitck the build.

BUG=chrome-os-partner:57993, chrome-os-partner:58146
BRANCH=None
TEST=emerge-caroline chromeos-bmpblk

Change-Id: I0f7acc6eb2950eb010ae3e63196a9abe5e793c65
Signed-off-by: Aaron Durbin <adurbin@chromium.org>