FIX: clear emoji cache after restore

lib/backup_restore/restorer.rb

@@ -50,6 +50,7 @@ module BackupRestore
       migrate_database
       reconnect_database
       reload_site_settings
+      clear_emoji_cache
 
       disable_readonly_mode
       ### READ-ONLY / END ###
@@ -267,6 +268,11 @@ module BackupRestore
       SiteSetting.refresh!
     end
 
+    def clear_emoji_cache
+      log "Clearing emoji cache..."
+      Emoji.clear_cache
+    end
+
     def extract_uploads
       if `tar --list --file #{@tar_filename} | grep 'uploads/'`.present?
         log "Extracting uploads..."