Summary:
while compiling on windows see duplicated symbols:
```
lld-link: error: duplicate symbol:
public: static char const *const folly::dynamic::TypeInfo<
class std::basic_string<char, struct std::char_traits<char>,
class std::allocator<char>>>::name
in buck-out\dev\gen\crypto\cat\cpp\tests\crypto_auth_token_util_test#compile-CryptoAuthTokenUtilTest.cpp.obj1f5bc0bc,windows-x86_64\out.obj
and in libdynamic.lib(out.obj)
```

Reviewed By: yfeldblum

Differential Revision: D20426321

fbshipit-source-id: 4e0346c624ad12561adb14f3a2e5f6e15bbbba26