bridges: Add favicon to bridges missing it

Adds favicon to bridges that support it. Some sites prevent downloading
favicons, those bridges are left untouched.

Affected bridges:

- AutoJMBridge
- BandcampBridge
- BlaguesDeMerdeBridge
- BloombergBridge
- BundesbankBridge
- ChristianDailyReporterBridge
- ContainerLinuxReleasesBridge
- DailymotionBridge
- DiceBridge
- DribbbleBridge
- EliteDangerousGalnetBridge
- ElsevierBridge
- FacebookBridge
- FB2Bridge
- FDroidBridge
- FierPandaBridge
- GooglePlusPostBridge
- JapanExpoBridge
- KATBridge
- KernelBugTrackerBridge
- LegifranceJOBridge
- NotAlwaysBridge
- NyaaTorrentsBridge
- PinterestBridge
- RadioMelodieBridge
- RainbowSixSiegeBridge
- SupInfoBridge
- TagBoardBridge
- TebeoBridge
- TheTVDBBridge
- WhydBridge
- ZoneTelechargementBridge

bridges/FacebookBridge.php

@@ -56,6 +56,10 @@ class FacebookBridge extends BridgeAbstract {
 	private $authorName = '';
 	private $groupName = '';
 
+	public function getIcon() {
+		return 'https://static.xx.fbcdn.net/rsrc.php/yo/r/iRmz9lCMBD2.ico';
+	}
+
 	public function getName(){
 
 		switch($this->queriedContext) {