Update code to upstream revision r767

Just reorganisation of the audio_processing code.

src/modules/audio_processing/agc/agc.gypi

@@ -0,0 +1,34 @@
+# Copyright (c) 2011 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.
+
+{
+  'targets': [
+    {
+      'target_name': 'agc',
+      'type': '<(library)',
+      'dependencies': [
+        '<(webrtc_root)/common_audio/common_audio.gyp:spl',
+      ],
+      'include_dirs': [
+        'interface',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          'interface',
+        ],
+      },
+      'sources': [
+        'interface/gain_control.h',
+        'analog_agc.c',
+        'analog_agc.h',
+        'digital_agc.c',
+        'digital_agc.h',
+      ],
+    },
+  ],
+}