Add automatic commit to the build process

Also update the script name.

Change-Id: I5d0a1012262eb61658d7d4a5e32a19aefff10ece
Reviewed-on: https://swiftshader-review.googlesource.com/3146
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Greg Hartman <ghartman@google.com>