update subtitles for lg

MediaBrowser.Dlna/Profiles/LgTvProfile.cs

@@ -189,6 +189,15 @@ namespace MediaBrowser.Dlna.Profiles
                    }
                }
            };
+
+            SubtitleProfiles = new[]
+            {
+                new SubtitleProfile
+                {
+                    Format = "srt",
+                    Method = SubtitleDeliveryMethod.External
+                }
+            };
         }
     }
 }

MediaBrowser.Dlna/Profiles/Xml/LG Smart TV.xml

@@ -77,5 +77,7 @@
     </CodecProfile>
   </CodecProfiles>
   <ResponseProfiles />
-  <SubtitleProfiles />
+  <SubtitleProfiles>
+    <SubtitleProfile format="srt" method="External" />
+  </SubtitleProfiles>
 </Profile>