util: Add a NORETURN macro

Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Ian Romanick <idr@freedesktop.org>

src/util/macros.h

@@ -171,6 +171,12 @@ do {                       \
 #define ATTRIBUTE_RETURNS_NONNULL
 #endif
 
+#ifdef HAVE_FUNC_ATTRIBUTE_NORETURN
+#define NORETURN __attribute__((__noreturn__))
+#else
+#define NORETURN
+#endif
+
 #ifdef __cplusplus
 /**
  * Macro function that evaluates to true if T is a trivially