Make RS compile on ARM64.

bug 13280327

Change-Id: I79080c448ca17d0cba8df075737c22b24ce9a085
diff --git a/cpu_ref/rsCpuScript.h b/cpu_ref/rsCpuScript.h
index c8a73bb..eeb38bf 100644
--- a/cpu_ref/rsCpuScript.h
+++ b/cpu_ref/rsCpuScript.h
@@ -91,14 +91,19 @@
 
     virtual Allocation * getAllocationForPointer(const void *ptr) const;
 
+#ifndef FAKE_ARM64_BUILD
 #ifndef RS_COMPATIBILITY_LIB
     virtual  void * getRSExecutable() { return mExecutable; }
 #endif
+#else
+    virtual void* getRSExecutable() { return NULL; }
+#endif
 
 protected:
     RsdCpuReferenceImpl *mCtx;
     const Script *mScript;
 
+#ifndef FAKE_ARM64_BUILD
 #ifndef RS_COMPATIBILITY_LIB
     int (*mRoot)();
     int (*mRootExpand)();
@@ -127,6 +132,7 @@
     size_t mExportedVariableCount;
     size_t mExportedFunctionCount;
 #endif
+#endif
 
     Allocation **mBoundAllocs;
     void * mIntrinsicData;