Add CacheGrind support to grinder coverage mode.

This CL also cleans up the command-lines across the instrument and grinder tools, making them consistent.

BUG=

Review URL: https://codereview.appspot.com/6816061

git-svn-id: http://sawbuck.googlecode.com/svn/trunk/syzygy@1210 15e8cca8-e42c-11de-a347-f34a4f72eb7d
10 files changed