Improve the Threading code on NetBSD

Do not include <sys/user.h> on NetBSD. It's dead file and will be removed.

No need to include <sys/sysctl.h> in this code context on NetBSD.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296973 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed