build: export the missing symbols

This exposes the missing symbols for test program.

BUG=chromium:844266
TEST=build

Change-Id: Ib0eebf8998d46ed1ea7db16dd116c51d901b76af
Reviewed-on: https://chromium-review.googlesource.com/1077808
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Miao-chen Chou <mcchou@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
3 files changed