clang-rename: fix the DynamicCastExpr test on ps4

It has RTTI disabled by default, so need to enable it explicitly.

Reviewers: silvas

Differential Revision: http://reviews.llvm.org/D21186

llvm-svn: 272381

clang-tools-extra/test/clang-rename/DynamicCastExpr.cpp

@@ -1,5 +1,5 @@
 // RUN: cat %s > %t.cpp
-// RUN: clang-rename -offset=186 -new-name=X %t.cpp -i --
+// RUN: clang-rename -offset=193 -new-name=X %t.cpp -i -- -frtti
 // RUN: sed 's,//.*,,' %t.cpp | FileCheck %s
 class Base {
   virtual int getValue() const = 0;