[scudo] Add missing tracing.h include to primary32 (llvm#159668)

Author: cferris1000

compiler-rt/lib/scudo/standalone/primary32.h

@@ -20,6 +20,7 @@
 #include "stats.h"
 #include "string_utils.h"
 #include "thread_annotations.h"
+#include "tracing.h"
 
 namespace scudo {
 

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

@@ -9,6 +9,8 @@
 #ifndef SCUDO_TRACING_H_
 #define SCUDO_TRACING_H_
 
+#include "common.h"
+
 #if defined(SCUDO_ENABLE_TRACING)
 
 // This file must include definitions for all of the functions below.