bump libgit2 to a59826
bump libgit2 to a59826

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