Use StringRef instead of raw pointer in ExecutionEngine

llvm-svn: 283016
diff --git a/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp b/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp
index d6b209a..1d7c6e7 100644
--- a/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp
+++ b/llvm/lib/ExecutionEngine/ExecutionEngineBindings.cpp
@@ -187,7 +187,7 @@
     // NoFramePointerElim.
     for (auto &F : *Mod) {
       auto Attrs = F.getAttributes();
-      auto Value = options.NoFramePointerElim ? "true" : "false";
+      StringRef Value(options.NoFramePointerElim ? "true" : "false");
       Attrs = Attrs.addAttribute(F.getContext(), AttributeSet::FunctionIndex,
                                  "no-frame-pointer-elim", Value);
       F.setAttributes(Attrs);