Update umbrella header.

Framework/AFNetworking.h

@@ -38,6 +38,7 @@ FOUNDATION_EXPORT const unsigned char AFNetworkingVersionString[];
 #import <AFNetworking/AFURLRequestSerialization.h>
 #import <AFNetworking/AFURLResponseSerialization.h>
 #import <AFNetworking/AFSecurityPolicy.h>
+#import <AFNetworking/AFCompatibilityMacros.h>
 
 #if !TARGET_OS_WATCH
 #import <AFNetworking/AFNetworkReachabilityManager.h>