BUILD: threads: Rename SPIN/RWLOCK macros using HA_ prefix

This remove any name conflicts, especially on Solaris.
diff --git a/include/proto/checks.h b/include/proto/checks.h
index b0b8c7d..2b285f3 100644
--- a/include/proto/checks.h
+++ b/include/proto/checks.h
@@ -37,15 +37,15 @@
  */
 static inline void health_adjust(struct server *s, short status)
 {
-	SPIN_LOCK(SERVER_LOCK, &s->lock);
+	HA_SPIN_LOCK(SERVER_LOCK, &s->lock);
 	/* return now if observing nor health check is not enabled */
 	if (!s->observe || !s->check.task) {
-		SPIN_UNLOCK(SERVER_LOCK, &s->lock);
+		HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
 		return;
 	}
 
 	__health_adjust(s, status);
-	SPIN_UNLOCK(SERVER_LOCK, &s->lock);
+	HA_SPIN_UNLOCK(SERVER_LOCK, &s->lock);
 }
 
 const char *init_check(struct check *check, int type);