Rebased PNaCl localmods in LLVM to 223109

lib/Support/Unix/Host.inc

Index: lib/Support/Unix/Host.inc
diff --git a/lib/Support/Unix/Host.inc b/lib/Support/Unix/Host.inc
index fcb3638d1cee65cec112697e4bf64627a1e46f76..2ab601f21c7005d54d9c710c39cfb9b5e76f9912 100644
--- a/lib/Support/Unix/Host.inc
+++ b/lib/Support/Unix/Host.inc
@@ -19,19 +19,25 @@
 #include "llvm/Config/config.h"
 #include "llvm/ADT/StringRef.h"
 #include "Unix.h"
+#if !defined(__native_client__)
 #include <sys/utsname.h>
+#endif // (__native_client__)
 #include <cctype>
 #include <string>
 
 using namespace llvm;
 
 static std::string getOSVersion() {
+#if !defined(__native_client__)
   struct utsname info;
 
   if (uname(&info))
     return "";
 
   return info.release;
+#else // (__native_client__)
+  return "";
+#endif // (__native_client__)
 }
 
 std::string sys::getDefaultTargetTriple() {