[libcxx] [test] Update msvc_stdlib_force_include.hpp.

MSVC's STL is replacing _HAS_FUNCTION_ASSIGN with _HAS_FUNCTION_ALLOCATOR_SUPPORT,
and is adding _HAS_UNEXPECTED.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@308535 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed