detachables: Add in definition of VbExDisplayMenu()

BUG=b:35585623
BRANCH=None
TEST=None
CQ-DEPEND=CL:457838

Change-Id: I549ae2dee6ad2e857782a7e931662c69038bf373
Signed-off-by: Shelley Chen <shchen@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/457863
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
1 file changed