Add NativeClient support to Triple::ParseOS.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138291 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index 8bb7f38..ccb1a24 100644
--- a/lib/Support/Triple.cpp
+++ b/lib/Support/Triple.cpp
@@ -356,6 +356,8 @@
     return Minix;
   else if (OSName.startswith("rtems"))
     return RTEMS;
+  else if (OSName.startswith("nacl"))
+    return NativeClient;
   else
     return UnknownOS;
 }