Resolve errors in perfkernel for Windows (#16031)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/16031
1. MSVC only has _mm_prefetch(const char*, int). Fixed in both python codegen and C++ files.
2. uint32_t in "cvtsh_ss_bugfix.h" requires "#include <cstdint>".
3. Some files use gflags headers. Add dependency via c10.
4. Isolate arch flags with interface library and private compile options.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15753
Reviewed By: dskhudia
Differential Revision: D13636233
Pulled By: jspark1105
fbshipit-source-id: cdcbd4240e07b749554a2a5676c11af88f23c31d
