Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/webrtc/modules/audio_coding/codecs/cng/cng.gypi

@@ -0,0 +1,35 @@
+# 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': 'CNG',
+      'type': 'static_library',
+      'dependencies': [
+        '<(webrtc_root)/common_audio/common_audio.gyp:common_audio',
+      ],
+      'include_dirs': [
+        'include',
+        '<(webrtc_root)',
+      ],
+      'direct_dependent_settings': {
+        'include_dirs': [
+          'include',
+          '<(webrtc_root)',
+        ],
+      },
+      'sources': [
+        'include/webrtc_cng.h',
+        'webrtc_cng.c',
+        'cng_helpfuns.c',
+        'cng_helpfuns.h',
+      ],
+    },
+  ], # targets
+}