[arm64] Fix order of decoder visitor add functions

src/arm64/decoder-arm64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/decoder-arm64.h"
 #include "src/globals.h"
 #include "src/utils.h"
 
 
 namespace v8 {
 namespace internal {
 
 
 void DispatchingDecoderVisitor::AppendVisitor(DecoderVisitor* new_visitor) {
   visitors_.remove(new_visitor);
+  visitors_.push_back(new_visitor);
+}
+
+
+void DispatchingDecoderVisitor::PrependVisitor(DecoderVisitor* new_visitor) {
+  visitors_.remove(new_visitor);
   visitors_.push_front(new_visitor);
 }
 
 
-void DispatchingDecoderVisitor::PrependVisitor(DecoderVisitor* new_visitor) {
-  visitors_.remove(new_visitor);
-  visitors_.push_back(new_visitor);
-}
-
-
 void DispatchingDecoderVisitor::InsertVisitorBefore(
     DecoderVisitor* new_visitor, DecoderVisitor* registered_visitor) {
   visitors_.remove(new_visitor);
   std::list<DecoderVisitor*>::iterator it;
   for (it = visitors_.begin(); it != visitors_.end(); it++) {
     if (*it == registered_visitor) {
       visitors_.insert(it, new_visitor);
       return;
     }
   }
@@ skipping 37 matching lines @@
       (*it)->Visit##A(instr);                                    \
     }                                                            \
   }
 VISITOR_LIST(DEFINE_VISITOR_CALLERS)
 #undef DEFINE_VISITOR_CALLERS
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM64