msvc: add libc++ temporariy fix

[hukeyue]

from libc++ source code: https://github.com/llvm/llvm-project/blob/458f1aae8d2da5bf786ba53ea200e94a918ff55a/libcxx/include/__functional/bind.h#L48

// C++17 recommends that we implement placeholders as `inline constexpr`, but allows
// implementing them as `extern <implementation-defined>`. Libc++ implements them as
// `extern const` in all standard modes to avoid an ABI break in C++03: making them
// `inline constexpr` requires removing their definition in the shared library to
// avoid ODR violations, which is an ABI break.
//
// In practice, since placeholders are empty, `extern const` is almost impossible
// to distinguish from `inline constexpr` from a usage stand point.
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<1> _1;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<2> _2;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<3> _3;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<4> _4;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<5> _5;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<6> _6;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<7> _7;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<8> _8;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<9> _9;
_LIBCPP_EXPORTED_FROM_ABI extern const __ph<10> _10;

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