Add include paths in gputest.gyp for use by additional gpu tests.

gyp/gpu.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 for building gpu
 {
   'target_defaults': {
     'conditions': [
       ['skia_os != "win"', {
         'sources/': [ ['exclude', '_win.(h|cpp)$'],
@@ skipping 94 matching lines @@
         '<@(skgpu_angle_gl_sources)',
         '<@(skgpu_mesa_gl_sources)',
         '<@(skgpu_debug_gl_sources)',
         '<@(skgpu_null_gl_sources)',
         'gpu.gypi', # Makes the gypi appear in IDEs (but does not modify the build).
       ],
       'conditions': [
         [ 'skia_gpu_extra_dependency_path', {
           'dependencies' : [
               '<(skia_gpu_extra_dependency_path):*',
-          ]
+          ],
+          'export_dependent_settings': [
+            '<(skia_gpu_extra_dependency_path):*',
+          ],
         }],
         [ 'skia_chrome_utils', {
           'sources': [
             '../experimental/ChromeUtils/SkBorder.cpp',
             '../experimental/ChromeUtils/SkBorder.h',
           ],
           'defines': [
             'GR_CHROME_UTILS=1',
           ],
         }],
@@ skipping 94 matching lines @@
             'libraries': [
               '-lGLESv2',
               '-lEGL',
             ],
           },
         }],
       ],
     },
   ],
 }