Fix the gdb path for NDK-r8b.

testing/android/native_test.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'conditions': [
     ['OS=="android"', {
       'targets': [
         {
           'target_name': 'native_test_apk',
@@ skipping 28 matching lines @@
               'action': [
                 'ant',
                 # TODO: All of these paths are absolute paths right now, while
                 # we really should be using relative paths for anything that is
                 # checked in to the Chromium tree (among which the SDK).
                 '-DPRODUCT_DIR=<(ant_build_out)',
                 '-DANDROID_SDK=<(android_sdk)',
                 '-DANDROID_SDK_ROOT=<(android_sdk_root)',
                 '-DANDROID_SDK_TOOLS=<(android_sdk_tools)',
                 '-DANDROID_SDK_VERSION=<(android_sdk_version)',
-                '-DANDROID_TOOLCHAIN=<(android_toolchain)',
                 '-DANDROID_GDBSERVER=<(android_gdbserver)',
                 '-DCHROMIUM_SRC=<(ant_build_out)/../..',
                 '-buildfile',
                 '<(DEPTH)/testing/android/native_test_apk.xml',
               ]
             }
           ],
         },
         {
           'target_name': 'native_test_native_code',
@@ skipping 31 matching lines @@
           'direct_dependent_settings': {
             'include_dirs': [
               '<(SHARED_INTERMEDIATE_DIR)',
             ],
           },
         },
       ],
     }]
   ],
 }