add missing memcpy and memset benchmarks to cmake build

Summary: as titled

Reviewed By: yfeldblum

Differential Revision: D84517032

fbshipit-source-id: d771063311489fb50dee294cade33e7362ea31c3

Author: YifanYuan3

third-party/folly/src/CMakeLists.txt

@@ -1162,10 +1162,12 @@ if (BUILD_TESTS OR BUILD_BENCHMARKS)
       TEST lazy_test SOURCES LazyTest.cpp
       TEST locks_test SOURCES SpinLockTest.cpp
       TEST math_test SOURCES MathTest.cpp
+      BENCHMARK memcpy_benchmark SOURCES MemcpyBenchmark.cpp
       TEST memcpy_test SOURCES MemcpyTest.cpp
       TEST memory_idler_test SOURCES MemoryIdlerTest.cpp
       TEST memory_test WINDOWS_DISABLED
         SOURCES MemoryTest.cpp
+      BENCHMARK memset_benchmark SOURCES MemsetBenchmark.cpp
       TEST move_wrapper_test SOURCES MoveWrapperTest.cpp
       TEST mpmc_pipeline_test SOURCES MPMCPipelineTest.cpp
       TEST mpmc_queue_test SLOW