Android: Enable in-tree libc++ builds

BUG=767901
R=thakis
CC=pcc

Change-Id: Ib394126f8e729192ee41520eefd85e22531bfd65
Reviewed-on: https://chromium-review.googlesource.com/1066596
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#561361}
2 files changed