Android: Enable in-tree libc++ builds

BUG=767901
R=thakis
CC=pcc

Change-Id: I70b017a99fe139d3925d7318116e435f5b6223ac
Reviewed-on: https://chromium-review.googlesource.com/c/1377329
Commit-Queue: Thomas Anderson <thomasanderson@chromium.org>
Reviewed-by: Peter Collingbourne <pcc@chromium.org>
Cr-Commit-Position: refs/heads/master@{#616803}
1 file changed