seccompsandbox: Update revision in DEPS, r170 -> r178

This fixes time() on Linux 3.1.

BUG=104084
TEST=trybots


Review URL: http://codereview.chromium.org/8536053

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@110844 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed