MINOR: threads: always place the clockid in the struct thread_info

It will be easier to deal with the internal API to always have it.

include/common/hathreads.h

@@ -50,6 +50,7 @@ enum { tid_bit = 1UL };
 enum { tid = 0 };
 
 extern struct thread_info {
+	clockid_t clock_id;
 	/* pad to cache line (64B) */
 	char __pad[0];            /* unused except to check remaining room */
 	char __end[0] __attribute__((aligned(64)));

src/haproxy.c

@@ -2500,6 +2500,8 @@ static void *run_thread_poll_loop(void *data)
 
 #ifdef USE_THREAD
 	pthread_getcpuclockid(pthread_self(), &thread_info[tid].clock_id);
+#else
+	thread_info[tid].clock_id = CLOCK_THREAD_CPUTIME_ID;
 #endif
 
 	tv_update_date(-1,-1);