bump libgit2 to 5fa8ab
bump libgit2 to 5fa8ab

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