Add vulkan files into skia repo.

gyp/tools.gyp

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
     # GYP file to build various tools.
 #
 # To build on Linux:
 #  ./gyp_skia tools.gyp && make tools
 #
 {
@@ skipping 466 matching lines @@
           '<(skia_include_path)/utils/SkDebugUtils.h',
           '<(skia_include_path)/utils/SkJSONCPP.h',
           '<(skia_include_path)/views/animated',
           '<(skia_include_path)/views/SkOSWindow_Android.h',
           '<(skia_include_path)/views/SkOSWindow_iOS.h',
           '<(skia_include_path)/views/SkOSWindow_Mac.h',
           '<(skia_include_path)/views/SkOSWindow_SDL.h',
           '<(skia_include_path)/views/SkOSWindow_Unix.h',
           '<(skia_include_path)/views/SkOSWindow_Win.h',
           '<(skia_include_path)/views/SkWindow.h',
+          '<(skia_include_path)/gpu/vk',
         ],
       },
       'include_dirs': [
         '<@(includes_to_test)',
       ],
       'sources': [
         # unused_param_test.cpp is generated by the action below.
         '<(INTERMEDIATE_DIR)/test_public_includes.cpp',
       ],
       'actions': [
@@ skipping 101 matching lines @@
               'flags.gyp:flags',
               'skia_lib.gyp:skia_lib',
               'resources',
             ],
           },
         ],
       },
     ],
   ],
 }