Fix the gdb path for NDK-r8b.

content/content_tests.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 826 matching lines @@
                 '<(PRODUCT_DIR)/content_shell_test/ContentShellTest-debug.apk',
               ],
               'action': [
                 'ant',
                 '-DPRODUCT_DIR=<(ant_build_out)',
                 '-DAPP_ABI=<(android_app_abi)',
                 '-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)',
                 '-buildfile',
                 '<(DEPTH)/content/shell/android/javatests/content_shell_test_apk.xml',
               ]
             }
           ],
         },
       ],
     }],
   ],
 }