bump libgit2 to ad0037
bump libgit2 to ad0037

libgit2/rugged,spraints/rugged,saraid/rugged,libgit2/rugged,tpickett66/rugged,saraid/rugged,Acidburn0zzz/rugged,spraints/rugged,libgit2/rugged,tpickett66/rugged,Acidburn0zzz/rugged,Acidburn0zzz/rugged,saraid/rugged,tpickett66/rugged