Update Google Benchmark library

llvm-svn: 322812
diff --git a/libcxx/utils/google-benchmark/src/log.h b/libcxx/utils/google-benchmark/src/log.h
index 978cb0b..d06e103 100644
--- a/libcxx/utils/google-benchmark/src/log.h
+++ b/libcxx/utils/google-benchmark/src/log.h
@@ -4,7 +4,7 @@
 #include <iostream>
 #include <ostream>
 
-#include "benchmark/macros.h"
+#include "benchmark/benchmark.h"
 
 namespace benchmark {
 namespace internal {
@@ -70,4 +70,4 @@
   (::benchmark::internal::GetLogInstanceForLevel(x) << "-- LOG(" << x << "):" \
                                                                          " ")
 
-#endif
\ No newline at end of file
+#endif