Split the URL by line breaks into separate requests.
With git reset the repo with each run. First perform a hard reset
to remove any local patches and then switch back to master incase
the repo was left on a branch or a detached head.
Add support to use a git cloned repo as the source. Move the download
code out of the build module and into a separate module. Add to this
module support for git.
Update the GCC common configuration to support using a symlinked
git repo.
Add checks for all languages.
