This is basically the same as the previous patches. Per review
comments by Brian, I've moved the git-fu shell code to
bin/extract_git_sha1. Unless there are objections, I'd like to push
this (with the various Reviewed-by and Acked-by lines added) sooner
rather than later. We can improve the git-
Once up on a time, we used to get bug reports from people running
random versions of DRI drivers. We would often find that the user had
an old driver, and their problem had already been fixed in a newer
version. This was also a time when Mesa releases occurred once every
12 to 18 months.
To fix
