Conflicts:
lib/libcxx/include/__config
d57c0cc3bfeff9af297279759ec2b631e6d95140 added support for DragonFlyBSD
to libc++ by updating some ifdefs. This needed to be synced with llvm13.
also start prefering NtDll API. so far:
* NtQueryInformationFile
* NtClose
adds a performance workaround for windows unicode conversion. but that
should probably be removed before merging