Android: rename android_build_type gyp variable.

build/android/cpufeatures.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.
 
 # Depend on the Android NDK's cpu feature detection. The WebView build is part
 # of the system and the library already exists; for the normal build there is a
 # gyp file in the checked-in NDK to build it.
 {
   'conditions': [
-    ['android_build_type != 0', {
+    ['android_webview_build == 1', {
       'libraries': [
         'cpufeatures.a'
       ],
     }, {
       'dependencies': [
         '<(android_ndk_root)/android_tools_ndk.gyp:cpu_features',
       ],
     }],
   ],
 }