XCode: use old network extension ID

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

WireGuard/WireGuard/Config/Version.xcconfig

@@ -1,2 +1,2 @@
-VERSION_NAME = 0.0.20181103
+VERSION_NAME = 0.0.20181104
 VERSION_ID = 1

WireGuard/WireGuard/VPN/TunnelsManager.swift

@@ -216,7 +216,7 @@ extension NETunnelProviderProtocol {
         let appId = Bundle.main.bundleIdentifier!
         let firstValidEndpoint = tunnelConfiguration.peers.first(where: { $0.endpoint != nil })?.endpoint
 
-        providerBundleIdentifier = "\(appId).WireGuardNetworkExtension"
+        providerBundleIdentifier = "\(appId).network-extension"
         providerConfiguration = [
             "tunnelConfiguration": serializedTunnelConfiguration,
             "tunnelConfigurationVersion": 1