Temporarily Revert "Update for llvm API change."

This reverts commit 215113 to match the reversion in llvm.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215156 91177308-0d34-0410-b5e6-96231b3b80d8

examples/clang-interpreter/main.cpp

@@ -45,6 +45,7 @@ std::string GetExecutablePath(const char *Argv0) {
 static llvm::ExecutionEngine *createExecutionEngine(llvm::Module *M,
                                                     std::string *ErrorStr) {
   llvm::EngineBuilder EB = llvm::EngineBuilder(M)
+                               .setUseMCJIT(true)
                                .setEngineKind(llvm::EngineKind::Either)
                                .setErrorStr(ErrorStr);
   return EB.create();