Merge pull request #714 from LLNL/feature/update-benchmark

Update google benchmark to 1.9.1

Author: white238

RELEASE-NOTES.md

@@ -14,6 +14,7 @@ The project release numbers follow [Semantic Versioning](http://semver.org/spec/
 
 ### Changed
 - Modified `blt_convert_to_system_includes` to handle multiple targets and recursively update includes for dependencies.
+- Updated GoogleBenchmark to 1.9.1
 
 ### Fixed
 - Removed GoogleTest, GoogleMock, and GoogleBenchmarks calling CMake's `GNUInstallDirs`

thirdparty_builtin/CMakeLists.txt

@@ -181,8 +181,8 @@ if(ENABLE_BENCHMARKS)
         endif()
 
         set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "")
-        add_subdirectory(benchmark-1.8.0
-                         ${BLT_BUILD_DIR}/thirdparty_builtin/benchmark-1.8.0)
+        add_subdirectory(benchmark-1.9.1
+                         ${BLT_BUILD_DIR}/thirdparty_builtin/benchmark-1.9.1)
 
         if (UNIX AND NOT APPLE)
           find_library(RT_LIBRARIES rt)