Add Hurd support.

Patch by samuel.thibault@ens-lyon.org

Differential Revision: https://reviews.llvm.org/D54079

llvm-svn: 346310
diff --git a/openmp/runtime/src/kmp_runtime.cpp b/openmp/runtime/src/kmp_runtime.cpp
index 01dd4b9..b861c06 100644
--- a/openmp/runtime/src/kmp_runtime.cpp
+++ b/openmp/runtime/src/kmp_runtime.cpp
@@ -7668,7 +7668,7 @@
 #if KMP_ARCH_X86_64 || KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS64
 
 #if KMP_OS_LINUX || KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_WINDOWS ||       \
-    KMP_OS_DARWIN
+    KMP_OS_DARWIN || KMP_OS_HURD
 
     int teamsize_cutoff = 4;
 
@@ -7696,7 +7696,7 @@
 
 #elif KMP_ARCH_X86 || KMP_ARCH_ARM || KMP_ARCH_AARCH || KMP_ARCH_MIPS
 
-#if KMP_OS_LINUX || KMP_OS_WINDOWS
+#if KMP_OS_LINUX || KMP_OS_WINDOWS || KMP_OS_HURD
 
     // basic tuning