StringRef'ize clang::drive::Option::getName(), from Zach Wheeler!

llvm-svn: 134418
diff --git a/clang/lib/Driver/Arg.cpp b/clang/lib/Driver/Arg.cpp
index f1177cf..39b7e55 100644
--- a/clang/lib/Driver/Arg.cpp
+++ b/clang/lib/Driver/Arg.cpp
@@ -113,7 +113,7 @@
     break;
 
   case Option::RenderSeparateStyle:
-    Output.push_back(getOption().getName());
+    Output.push_back(getOption().getName().data());
     for (unsigned i = 0, e = getNumValues(); i != e; ++i)
       Output.push_back(getValue(Args, i));
     break;