Reset layout to undefined when we realloc VkTexture memory

src/gpu/vk/GrVkTexture.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.
  */
 
 #include "GrVkTexture.h"
 #include "GrVkGpu.h"
 #include "GrVkImageView.h"
@@ skipping 194 matching lines @@
                                                              GrVkImageView::kColor_Type, mipLevels);
     if (!textureView) {
         imageResource->unref(gpu);
         return false;
     }
 
     oldResource->unref(gpu);
     oldView->unref(gpu);
     fResource = imageResource;
     fTextureView = textureView;
+    fCurrentLayout = VK_IMAGE_LAYOUT_UNDEFINED;
     this->texturePriv().setMaxMipMapLevel(mipLevels);
 
     return true;
 }