kernel: Changes to avoid warnings during compilation

Changes to avoid warnings for enabling Werror flag in LK.

Change-Id: Ia7263e555be3e582d1ed433c806788f1151219a4
diff --git a/kernel/thread.c b/kernel/thread.c
index 58dff8d..2c205ee 100644
--- a/kernel/thread.c
+++ b/kernel/thread.c
@@ -1,6 +1,8 @@
 /*
  * Copyright (c) 2008-2009 Travis Geiselbrecht
  *
+ * Copyright (c) 2014, The Linux Foundation. All rights reserved.
+ *
  * Permission is hereby granted, free of charge, to any person obtaining
  * a copy of this software and associated documentation files
  * (the "Software"), to deal in the Software without restriction,
@@ -262,6 +264,7 @@
 	thread_resched();
 
 	panic("somehow fell through thread_exit()\n");
+	for(;;);
 }
 
 static void idle_thread_routine(void)