Rearrange the bools in prof_tdata_t to save some bytes.

This lowered the sizeof(prof_tdata_t) from 200 to 192 which is a round size
class.  Afterwards the tdata_t size remain unchanged with the last commit, which
effectively inlined the storage of thread names for free.

include/jemalloc/internal/prof_structs.h

@@ -156,9 +156,6 @@ struct prof_tdata_s {
 	 */
 	uint64_t		thr_discrim;
 
-	bool			attached;
-	bool			expired;
-
 	rb_node(prof_tdata_t)	tdata_link;
 
 	/*
@@ -198,6 +195,9 @@ struct prof_tdata_s {
 	 */
 	bool			active;
 
+	bool			attached;
+	bool			expired;
+
 	/* Temporary storage for summation during dump. */
 	prof_cnt_t		cnt_summed;