Fix case-sensitive build system errors.

This is https://codereview.webrtc.org/2141093002/, just wanted to get it in.

NOTRY=True
BUG=

Review-Url: https://codereview.webrtc.org/2214113002
Cr-Commit-Position: refs/heads/master@{#13649}

webrtc/examples/objc/AppRTCDemo/RTCIceServer+JSON.h

@@ -0,0 +1,19 @@
+/*
+ *  Copyright 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 "WebRTC/RTCIceServer.h"
+
+@interface RTCIceServer (JSON)
+
++ (RTCIceServer *)serverFromJSONDictionary:(NSDictionary *)dictionary;
+// CEOD provides different JSON, and this parses that.
++ (RTCIceServer *)serverFromCEODJSONDictionary:(NSDictionary *)dictionary;
+
+@end