[libcxx] [test] Update msvc_stdlib_force_include.hpp.

MSVC's STL removed _SCL_SECURE_NO_WARNINGS.

MSVC's STL implemented feature-test macros.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@334675 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed