Fix Android build.

build/android.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 69 matching lines @@
                 # turn will leave out some template stuff for 'long long'. What
                 # we want is -std=c++11, but this is not supported by GCC 4.6 or
                 # Xcode 4.2
                 '-std=gnu++0x' ],
     'target_conditions': [
       ['_toolset=="target"', {
         'cflags!': [
           '-pthread',  # Not supported by Android toolchain.
         ],
         'cflags': [
-          '-U__linux__',  # Don't allow toolchain to claim -D__linux__

[ulan, 2014/08/19 08:09:02]

Chrome common.gypi doesn't have line anymore.

           '-ffunction-sections',
           '-funwind-tables',
           '-fstack-protector',
           '-fno-short-enums',
           '-finline-limit=64',
           '-Wa,--noexecstack',
           '-Wno-error=non-virtual-dtor',  # TODO(michaelbai): Fix warnings.
           # Note: This include is in cflags to ensure that it comes after
           # all of the includes.
           '-I<(android_include)',
@@ skipping 169 matching lines @@
         'ldflags!': [
           '-Wl,-z,noexecstack',
           '-Wl,--gc-sections',
           '-Wl,-O1',
           '-Wl,--as-needed',
         ],
       }],
     ],  # target_conditions
   },  # target_defaults
 }