Fix 64-bit pointer type for non-x32 ABIs.

BUG=swiftshader:9

Change-Id: Ife06416736d47acba4f2cff1ea8b17be61134752
diff --git a/src/IceTargetLowering.h b/src/IceTargetLowering.h
index b8bfff0..568b81f 100644
--- a/src/IceTargetLowering.h
+++ b/src/IceTargetLowering.h
@@ -175,6 +175,7 @@
   // Each target must define a public static method:
   //   static void staticInit(GlobalContext *Ctx);
   static bool shouldBePooled(const class Constant *C);
+  static Type getPointerType();
 
   static std::unique_ptr<TargetLowering> createLowering(TargetArch Target,
                                                         Cfg *Func);