rtmp-services: Add Livestream service

Closes jp9000/obs-studio#798

plugins/rtmp-services/data/package.json

 {
 	"url": "https://obsproject.com/obs2_update/rtmp-services",
-	"version": 54,
+	"version": 55,
 	"files": [
 		{
 			"name": "services.json",
-			"version": 54
+			"version": 55
 		}
 	]
 }

plugins/rtmp-services/data/services.json

@@ -854,6 +854,15 @@
                     "url": "rtmp://plive.pandora.tv:80/mediaHub"
                 }
             ]
+        },
+        {
+            "name": "LiveStream",
+            "servers": [
+                {
+                    "name": "Primary",
+                    "url": "rtmp://rtmpin.livestreamingest.com/rtmpin"
+                }
+            ]
         }
     ]
 }