Make fully_qualified_type_name_impl() compatible with VS2017 15.9 (pytorch#31455)

Summary: Pull Request resolved: pytorch#31455 In 15.9, __FUNCSIG__ unwraps using definitions as well as preserves noexcept qualifiers Test Plan: Build caffe2 on Windows using VS2017 Differential Revision: D19166204 fbshipit-source-id: b6c5f70e5262d13adf585f77b92223cf5f1e78dd

Author: malfet

c10/util/TypeIndex.h

@@ -60,8 +60,8 @@ template <typename T>
 inline C10_TYPENAME_CONSTEXPR string_view fully_qualified_type_name_impl() noexcept {
 #if defined(_MSC_VER) && !defined(__clang__)
  return extract(
- "class c10::string_view __cdecl c10::util::detail::fully_qualified_type_name_impl<",
- ">(void)",
+ "class c10::basic_string_view<char> __cdecl c10::util::detail::fully_qualified_type_name_impl<",
+ ">(void) noexcept",
  __FUNCSIG__);
 #elif defined(__clang__)
  return extract(