Switch optimization level from metadata to bitcode wrapper.

Change-Id: Ieb547d38f2ad1c84af30717da9172d0ac928e52d
diff --git a/lib/ExecutionEngine/ScriptCompiled.h b/lib/ExecutionEngine/ScriptCompiled.h
index 6a1a9e8..42739e9 100644
--- a/lib/ExecutionEngine/ScriptCompiled.h
+++ b/lib/ExecutionEngine/ScriptCompiled.h
@@ -97,6 +97,13 @@
 
     void *lookup(const char *name);
 
+    uint32_t getCompilerVersion() const {
+      return mpOwner->getCompilerVersion();
+    }
+
+    uint32_t getOptimizationLevel() const {
+      return mpOwner->getOptimizationLevel();
+    }
 
     size_t getExportVarCount() const {
       return mExportVars.size();