[builtins] Move more files into v8_builtins_generators source set

src/builtins/builtins-promise-gen.h

 // Copyright 2016 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.
 
 #ifndef V8_BUILTINS_BUILTINS_PROMISE_H_
 #define V8_BUILTINS_BUILTINS_PROMISE_H_
 
 #include "src/code-stub-assembler.h"
 #include "src/contexts.h"
 
@@ skipping 125 matching lines @@
   Node* CreateThrowerFunction(Node* reason, Node* native_context);
 
  private:
   Node* AllocateJSPromise(Node* context);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_PROMISE_H_