bc: upgrade to latest version

This brings in new sandbox features.

BUG=chromium:884778
TEST=precq passes

Change-Id: I69d63db0d42f227064e866efc3f3cb60fc9f824e
Reviewed-on: https://chromium-review.googlesource.com/1229236
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Greg Kerr <kerrnel@chromium.org>
8 files changed