Build dynamic iOS SDK.

- Places most ObjC code into webrtc/sdk/objc instead.
- New gyp targets to build, strip and export symbols for dylib.
- Removes old script used to generate dylib.

BUG=

Review URL: https://codereview.webrtc.org/1903663002

Cr-Commit-Position: refs/heads/master@{#12524}
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDAppDelegate.m b/webrtc/examples/objc/AppRTCDemo/ios/ARDAppDelegate.m
index c18c818..8f19262 100644
--- a/webrtc/examples/objc/AppRTCDemo/ios/ARDAppDelegate.m
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDAppDelegate.m
@@ -10,10 +10,10 @@
 
 #import "ARDAppDelegate.h"
 
-#import "webrtc/base/objc/RTCFieldTrials.h"
-#import "webrtc/base/objc/RTCLogging.h"
-#import "webrtc/base/objc/RTCSSLAdapter.h"
-#import "webrtc/base/objc/RTCTracing.h"
+#import "WebRTC/RTCFieldTrials.h"
+#import "WebRTC/RTCLogging.h"
+#import "WebRTC/RTCSSLAdapter.h"
+#import "WebRTC/RTCTracing.h"
 
 #import "ARDMainViewController.h"
 
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDMainViewController.m b/webrtc/examples/objc/AppRTCDemo/ios/ARDMainViewController.m
index a634952..d11f092 100644
--- a/webrtc/examples/objc/AppRTCDemo/ios/ARDMainViewController.m
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDMainViewController.m
@@ -12,8 +12,8 @@
 
 #import <AVFoundation/AVFoundation.h>
 
-#import "webrtc/base/objc/RTCDispatcher.h"
-#import "webrtc/base/objc/RTCLogging.h"
+#import "WebRTC/RTCDispatcher.h"
+#import "WebRTC/RTCLogging.h"
 #import "webrtc/modules/audio_device/ios/objc/RTCAudioSession.h"
 #import "webrtc/modules/audio_device/ios/objc/RTCAudioSessionConfiguration.h"
 
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m b/webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m
index be0bdd5..f452242 100644
--- a/webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDStatsView.m
@@ -10,7 +10,7 @@
 
 #import "ARDStatsView.h"
 
-#import "webrtc/api/objc/RTCStatsReport.h"
+#import "WebRTC/RTCStatsReport.h"
 
 #import "ARDStatsBuilder.h"
 
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.h b/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.h
index 980abd4..dec1bfc 100644
--- a/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.h
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallView.h
@@ -10,8 +10,8 @@
 
 #import <UIKit/UIKit.h>
 
-#import "webrtc/api/objc/RTCEAGLVideoView.h"
-#import "webrtc/base/objc/RTCCameraPreviewView.h"
+#import "WebRTC/RTCCameraPreviewView.h"
+#import "WebRTC/RTCEAGLVideoView.h"
 
 #import "ARDStatsView.h"
 
diff --git a/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m b/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m
index b878677..80bbb10 100644
--- a/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m
+++ b/webrtc/examples/objc/AppRTCDemo/ios/ARDVideoCallViewController.m
@@ -10,11 +10,11 @@
 
 #import "ARDVideoCallViewController.h"
 
-#import "webrtc/base/objc/RTCDispatcher.h"
 #import "webrtc/modules/audio_device/ios/objc/RTCAudioSession.h"
 
-#import "webrtc/api/objc/RTCAVFoundationVideoSource.h"
-#import "webrtc/base/objc/RTCLogging.h"
+#import "WebRTC/RTCAVFoundationVideoSource.h"
+#import "WebRTC/RTCDispatcher.h"
+#import "WebRTC/RTCLogging.h"
 
 #import "ARDAppClient.h"
 #import "ARDVideoCallView.h"