Add string_to_float benchmark into CMakeLists.txt

Summary: The string to float benchmark is missing from CMakeLists.txt

Reviewed By: Gownta

Differential Revision: D63727675

fbshipit-source-id: 63d65853098b9c90691349ceed6952c99ad0573c

CMakeLists.txt

@@ -1159,6 +1159,7 @@ if (BUILD_TESTS OR BUILD_BENCHMARKS)
       TEST spin_lock_test SOURCES SpinLockTest.cpp
       BENCHMARK string_benchmark WINDOWS_DISABLED SOURCES StringBenchmark.cpp
       TEST string_test WINDOWS_DISABLED SOURCES StringTest.cpp
+      BENCHMARK string_to_float_benchmark SOURCES StringToFloatBenchmark.cpp
       BENCHMARK synchronized_benchmark WINDOWS_DISABLED
         SOURCES SynchronizedBenchmark.cpp
       TEST synchronized_test WINDOWS_DISABLED