Update Google Benchmark library

llvm-svn: 322812
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 1903976d37868f8e13e60e44b77a71b5ede04bed
diff --git a/benchmarks/filesystem.bench.cpp b/benchmarks/filesystem.bench.cpp
index f7949a1..6771980 100644
--- a/benchmarks/filesystem.bench.cpp
+++ b/benchmarks/filesystem.bench.cpp
@@ -1,6 +1,6 @@
 #include <experimental/filesystem>
 
-#include "benchmark/benchmark_api.h"
+#include "benchmark/benchmark.h"
 #include "GenerateInput.hpp"
 #include "test_iterators.h"
 
@@ -135,4 +135,4 @@
 BENCHMARK_CAPTURE(BM_PathIterateOnceBackwards, iterate_elements,
   getRandomStringInputs)->Arg(TestNumInputs);
 
-BENCHMARK_MAIN()
+BENCHMARK_MAIN();