Moving webrtc.gni up one level from build/

webrtc/voice_engine/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
-import("../build/webrtc.gni")
+import("../webrtc.gni")
 
 rtc_static_library("audio_coder") {
   sources = [
     "coder.cc",
     "coder.h",
   ]
   deps = [
     "..:webrtc_common",
     "../modules/audio_coding",
     "../modules/audio_coding:audio_format_conversion",
@@ skipping 394 matching lines @@
         ]
       }
 
       if (!build_with_chromium && is_clang) {
         # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
         suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
       }
     }
   }
 }