Position of attribute of lambda call operator relative to _noexcept-specifier_ is inconsistent with GCC and MSVC

[JohelEGP]

I found this out while working on hsutter/cppfront#506.
See https://compiler-explorer.com/z/qnMEv81Tx:

#if defined(_MSC_VER)
auto f = []() noexcept [[msvc::forceinline]] { };
#elif !defined(__clang__)
auto f = []() noexcept __attribute__((always_inline)) { };
#else
auto f = []() __attribute__((always_inline)) noexcept { };
#endif

[llvmbot]

@llvm/issue-subscribers-clang-frontend

Author: Johel Ernesto Guerrero Peña (JohelEGP)

I found this out while working on <https://github.com/hsutter/cppfront/pull/506>. See <https://compiler-explorer.com/z/qnMEv81Tx>: ```C++ #if defined(_MSC_VER) auto f = []() noexcept [[msvc::forceinline]] { }; #elif !defined(__clang__) auto f = []() noexcept __attribute__((always_inline)) { }; #else auto f = []() __attribute__((always_inline)) noexcept { }; #endif ```

[shafik]

CC @erichkeane