syscall: the signal received during system call processing is not processed.

Refs: #1176
Fujitsu: POSTK_DEBUG_TEMP_FIX_56
Change-Id: I410160ccbcef3ef49a0e37611a608bc87c97e63b

kernel/process.c

@@ -3150,11 +3150,11 @@ void spin_sleep_or_schedule(void)
 		}
 		ihk_mc_spinlock_unlock(&thread->spin_sleep_lock, irqstate);
 
-#ifdef POSTK_DEBUG_TEMP_FIX_56 /* in futex_wait() signal handring fix. */
-		if (hassigpending(cpu_local_var(current))) {
+		if ((!list_empty(&thread->sigpending) ||
+		     !list_empty(&thread->sigcommon->sigpending)) &&
+		    hassigpending(thread)) {
 			woken = 1;
 		}
-#endif /* POSTK_DEBUG_TEMP_FIX_56 */
 
 		if (woken) {
 			return;