bump libgit2 to b8daa9
bump libgit2 to b8daa9

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