Fix portability/Time.h on OSX

Summary: It needs stdint to define uint8_t

Reviewed By: yfeldblum, mzlee

Differential Revision: D3101140

fb-gh-sync-id: 308507af1ccd81e2eb389a400376556a6cc597b2
fbshipit-source-id: 308507af1ccd81e2eb389a400376556a6cc597b2

folly/Benchmark.h

@@ -17,9 +17,11 @@
 #ifndef FOLLY_BENCHMARK_H_
 #define FOLLY_BENCHMARK_H_
 
-#include <folly/ScopeGuard.h>
 #include <folly/Portability.h>
 #include <folly/Preprocessor.h> // for FB_ANONYMOUS_VARIABLE
+#include <folly/ScopeGuard.h>
+#include <folly/portability/Time.h>
+
 #include <cassert>
 #include <ctime>
 #include <boost/function_types/function_arity.hpp>

folly/portability/Time.h

@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <stdint.h>
 #include <time.h>
 
 #include <folly/portability/Config.h>