DMD build

[Martin Nowak]

> I would expect rebasing to fix it trivially so long as git mv was used rather
> than renaming the file with the OS' commands, but I don't know for sure.
>
> - Jonathan M Davis
>

Git doesn't record renamings but uses a heuristic check for similarity 
instead. Rebasing will be trivial as long as the rename detection 
succeeds. Once the '.cc' files differ too much from the '.c' base in an 
open pull request it'll cause a delete/modify conflict.
http://stackoverflow.com/questions/2314437/resolve-conflict-delete-modify-in-git