bump libgit2 to 2d2260
bump libgit2 to 2d2260

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