Include gnu-libstdc++/include in -I paths for android build.

build/common.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.
 
 # IMPORTANT:
 # Please don't directly include this file if you are building via gyp_chromium,
 # since gyp_chromium is automatically forcing its inclusion.
 {
   # Variables expected to be overriden on the GYP command line (-D) or by
   # ~/.gyp/include.gypi.
@@ skipping 3088 matching lines @@
               # The include ordering here is important; change with caution.
               ['use_system_stlport==1', {
                 'cflags': [
                   # For libstdc++/include, which is used by stlport.
                   '-I<(android_src)/bionic',
                   '-I<(android_src)/external/stlport/stlport',
                 ],
               }, { # else: use_system_stlport!=1
                 'cflags': [
                   '-I<(android_ndk_root)/sources/cxx-stl/stlport/stlport',
+                  '-I<(android_ndk_root)/sources/cxx-stl/gnu-libstdc++/4.6/include',
                 ],
                 'conditions': [
                   ['target_arch=="arm" and armv7==1', {
                     'ldflags': [
                       '-L<(android_ndk_root)/sources/cxx-stl/stlport/libs/armeabi-v7a',
                       '-L<(android_ndk_root)/sources/cxx-stl/gnu-libstdc++/4.6/libs/armeabi-v7a',
                     ],
                   }],
                   ['target_arch=="arm" and armv7==0', {
                     'ldflags': [
@@ skipping 801 matching lines @@
     # settings in target dicts.  SYMROOT is a special case, because many other
     # Xcode variables depend on it, including variables such as
     # PROJECT_DERIVED_FILE_DIR.  When a source group corresponding to something
     # like PROJECT_DERIVED_FILE_DIR is added to a project, in order for the
     # files to appear (when present) in the UI as actual files and not red
     # red "missing file" proxies, the correct path to PROJECT_DERIVED_FILE_DIR,
     # and therefore SYMROOT, needs to be set at the project level.
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }