gn: fix fiddle

tools/fiddle/draw.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 // This is an example of the translation unit that needs to be
 // assembled by the fiddler program to compile into a fiddle: an
 // implementation of the GetDrawOptions() and draw() functions.
 
 #include "fiddle_main.h"
 DrawOptions GetDrawOptions() {
     // path *should* be absolute.
-    static const char path[] = "../../resources/color_wheel.png";
+    static const char path[] = "resources/color_wheel.png";
     return DrawOptions(256, 256, true, true, true, true, path);
 }
 void draw(SkCanvas* canvas) {
     canvas->clear(SK_ColorWHITE);
     SkMatrix matrix;
     matrix.setScale(0.75f, 0.75f);
     matrix.preRotate(30.0f);
     SkPaint paint;
     paint.setShader(image->makeShader(SkShader::kRepeat_TileMode,
                                       SkShader::kRepeat_TileMode,
                                       &matrix));
     canvas->drawPaint(paint);
 }