Suppress -Wshadow-compatible-local in folly/test/stl_tests/StlVectorTest.cpp

Summary:
[Folly] Suppress `-Wshadow-compatible-local` in `folly/test/stl_tests/StlVectorTest.cpp`.

That test source file is heavily macro-driven, and using `SCOPED_TRACE` repeatedly in macros can lead to violations of `-Wshadow-compatible-local`.

Reviewed By: meyering

Differential Revision: D7231029

fbshipit-source-id: 122e1d86032cf884a83ef1716fa48b8f4864a363

folly/test/stl_tests/StlVectorTest.cpp

@@ -195,6 +195,8 @@ THOUGHTS:
 FOLLY_PUSH_WARNING
 FOLLY_GCC_DISABLE_WARNING("-Wunused-parameter")
 FOLLY_GCC_DISABLE_WARNING("-Wunused-variable")
+// Using SCOPED_TRACE repeatedly from within a macro violates -Wshadow
+FOLLY_GCC_DISABLE_WARNING("-Wshadow-compatible-local")
 
 using namespace std;
 using namespace folly;