* moves `std::hash` and `std::unary_function` into `__functional`
* Everything else goes into `__utility/${NAME}.h`
Differential Revision: https://reviews.llvm.org/D104002
* moves `std::hash` and `std::unary_function` into `__functional`
* Everything else goes into `__utility/${NAME}.h`
Differential Revision: https://reviews.llvm.org/D104002