Bundle 3 branches on fast path into tsd_state.

Added tsd_state_nominal_slow, which on fast path malloc() incorporates
tcache_enabled check, and on fast path free() bundles both malloc_slow and
tcache_enabled branches.

include/jemalloc/internal/tcache_inlines.h

@@ -40,6 +40,7 @@ tcache_enabled_set(tsd_t *tsd, bool enabled) {
 	}
 	/* Commit the state last.  Above calls check current state. */
 	tsd_tcache_enabled_set(tsd, enabled);
+	tsd_slow_update(tsd);
 }
 
 JEMALLOC_ALWAYS_INLINE void