[libcxx] GNU/Hurd uses BSD-based interfaces, but does not (and won't) provide <sys/sysctl.h>
[libcxx] GNU/Hurd uses BSD-based interfaces, but does not (and won't) provide <sys/sysctl.h>

Reviewed as https://reviews.llvm.org/D54338.

Thanks to sthibaul for the patch.

git-svn-id: 756ef344af921d95d562d9e9f9389127a89a6314@346763 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx,llvm-mirror/libcxx