bump libgit2 to 1b405a
bump libgit2 to 1b405a

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