Give a temp cost-center(cc) name to VG_(malloc) in m_recordreplay/replay.c. Need to modify name after understanding VG_(arena_malloc) api.

For valgrind 3.9 api, VG_(malloc) need new parameter cost-center(cc) name.
Without understanding the api, we given a temporary string("rr.load_record_data") as a cc name to make valgrindrr runs(not drive assert).
TODO: modify it future after understanding VG_(arena_malloc) api.
Bug Fix in origin valgrindrr: assertion given wrong parameter for printing on the screen.