Update to arm64 Windows port.
* js/windows-arm64:
max_tree_depth: lower it for clangarm64 on Windows
mingw(arm64): do move the `/etc/git*` location
msvc: do handle builds on Windows/ARM64
mingw: do not use nedmalloc on Windows/ARM64
config.mak.uname: add support for clangarm64
bswap.h: add support for built-in bswap functions