Linux sandbox: print kernel support in credentials unittests.

Make sure that we flush stdout after printing status.

BUG=312380
R=jorgelo@chromium.org

Review URL: https://codereview.chromium.org/59843005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233097 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233097
command_buffer: Remove hash_tables.h, simplify atomicops.h

command_buffer was historically included in nacl-compiled things, and base
wasn't. These days, base is included in nacl-compiled things too, so the
duplication can be removed.

BUG=none
R=piman@chromium.org

Review URL: https://codereview.chromium.org/58913003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@233098 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 233098