Split iOS sdk in to separate targets

webrtc/sdk/objc/Framework/Classes/Audio/RTCAudioSource+Private.h

 /*
  *  Copyright 2016 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 "WebRTC/RTCAudioSource.h"
 
-#import "RTCMediaSource+Private.h"
+#import "PeerConnection/RTCMediaSource+Private.h"
 
 @interface RTCAudioSource ()
 
 /**
  * The AudioSourceInterface object passed to this RTCAudioSource during
  * construction.
  */
 @property(nonatomic, readonly) rtc::scoped_refptr<webrtc::AudioSourceInterface> nativeAudioSource;
 
 /** Initialize an RTCAudioSource from a native AudioSourceInterface. */
 - (instancetype)initWithNativeAudioSource:
     (rtc::scoped_refptr<webrtc::AudioSourceInterface>)nativeAudioSource
     NS_DESIGNATED_INITIALIZER;
 
 - (instancetype)initWithNativeMediaSource:
     (rtc::scoped_refptr<webrtc::MediaSourceInterface>)nativeMediaSource
                                      type:(RTCMediaSourceType)type NS_UNAVAILABLE;
 
 @end