[compiler-rt] Define __STDC_FORMAT_MACROS to ensure PRId64 is available

Author: giordano

compiler-rt/lib/scudo/standalone/timing.h

@@ -14,6 +14,10 @@
 #include "string_utils.h"
 #include "thread_annotations.h"
 
+#ifndef __STDC_FORMAT_MACROS
+// Ensure PRId64 macro is available
+#define __STDC_FORMAT_MACROS 1
+#endif
 #include <inttypes.h>
 #include <string.h>