- Define CLOCK_MONOTONIC_RAW if missing

--- src/amd/vulkan/radv_device.c.orig	2018-11-06 16:16:02 UTC
+++ src/amd/vulkan/radv_device.c
@@ -50,6 +50,14 @@
 #include "util/debug.h"
 #include "util/mesa-sha1.h"
 
+#ifndef CLOCK_MONOTONIC_RAW
+# ifdef CLOCK_MONOTONIC_FAST
+#  define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC_FAST
+# else
+#  define CLOCK_MONOTONIC_RAW CLOCK_MONOTONIC
+# endif
+#endif
+
 static int
 radv_device_get_cache_uuid(enum radeon_family family, void *uuid)
 {