src/common/thread.h: include common/utils.h for STARPU_UYIELD() definition

src/common/thread.h

@@ -1,7 +1,7 @@
 /* StarPU --- Runtime system for heterogeneous multicore architectures.
  *
  * Copyright (C) 2010, 2012-2014, 2016  Université de Bordeaux
- * Copyright (C) 2010, 2011, 2012, 2013, 2014  CNRS
+ * Copyright (C) 2010, 2011, 2012, 2013, 2014, 2016  CNRS
  *
  * StarPU is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as published by
@@ -19,6 +19,7 @@
 #define __COMMON_THREAD_H__
 
 #include <starpu.h>
+#include <common/utils.h>
 
 #if defined(STARPU_LINUX_SYS) && defined(STARPU_HAVE_XCHG)
 int _starpu_pthread_spin_do_lock(starpu_pthread_spinlock_t *lock);