Add -fvisibility=default to libchromeos targets

BUG=chromium:315233
TEST=x86-generic-full and daisy-full trybots pass

Change-Id: I15eb018c14758603ccaf8d2e275a74ef4da68f86
Reviewed-on: https://chromium-review.googlesource.com/175750
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Liam McLoughlin <lmcloughlin@chromium.org>
Tested-by: Liam McLoughlin <lmcloughlin@chromium.org>
1 file changed