uti: Replace dead uti thread with new mcexec thread in proc->tids

Change-Id: Ic6e906dd1bfac1b07f1317732cbe0a5191831cd8

arch/arm64/kernel/syscall.c

@@ -1575,7 +1575,7 @@ done:
 		return 0;
 	}
 
-	if (tthread->thread_offloaded) {
+	if (tthread->uti_state == UTI_STATE_RUNNING_IN_LINUX) {
 		interrupt_syscall(tthread, sig);
 		release_thread(tthread);
 		return 0;

arch/x86_64/kernel/syscall.c

@@ -1370,7 +1370,7 @@ done:
 	}
 
 	/* Forward signal to Linux by interrupt_syscall mechanism */
-	if (tthread->thread_offloaded) {
+	if (tthread->uti_state == UTI_STATE_RUNNING_IN_LINUX) {
 		if (!tthread->proc->nohost) {
 			interrupt_syscall(tthread, sig);
 		}