Recheck boringssl's OPENSSL_NO_ASM for Windows build

[perklet]

BoringSSL won't link without this option on Windows, due to missing symbols of the fiat lib.

This option literally means no assembly code at all, but the code says otherwise, it is not clear whether it turns off assembly completely or not. If so, performance can be hurt, if not, maybe we can leave it as is.

Useful links:

1. boringssl: Compiling with OPENSSL_NO_ASM harms throughput of secure connections significantly grpc/grpc#9440
2. https://github.com/mit-plv/fiat-crypto
3. https://boringssl.googlesource.com/boringssl/+/HEAD/BUILDING.md
4. https://stackoverflow.com/questions/26963740/linking-in-assembly-files-with-mingw
5. https://github.com/google/boringssl/blob/master/util/generate_build_files.py
6. is there any way to run tmate using the standard MSYS2 environment set by msys2/setup-msys2@v2? mxschmitt/action-tmate#86