Fix arena_reset() test to avoid tcache.
Fix arena_reset() test to avoid tcache.

wqfish/jemalloc,glandium/jemalloc,AndroidExternal/jemalloc,AndroidExternal/jemalloc,glandium/jemalloc,jemalloc/jemalloc-cmake,leebaok/jemalloc-4.2.1-readcode,wqfish/jemalloc,wqfish/jemalloc,wqfish/jemalloc,wqfish/jemalloc,jemalloc/jemalloc-cmake,8l/jemalloc,8l/jemalloc,AndroidExternal/jemalloc,leebaok/jemalloc-4.2.1-readcode,8l/jemalloc,glandium/jemalloc,8l/jemalloc,jemalloc/jemalloc-cmake,AndroidExternal/jemalloc,leebaok/jemalloc-4.2.1-readcode,jemalloc/jemalloc-cmake,leebaok/jemalloc-4.2.1-readcode,glandium/jemalloc