add missing gpl3 header to SuggestionListAdapter

app/src/main/java/org/schabi/newpipe/SuggestionListAdapter.java

@@ -13,7 +13,24 @@ import java.util.ArrayList;
 
 /**
  * Created by Madiyar on 23.02.2016.
+ *
+ * Copyright (C) Christian Schabesberger 2015 <chris.schabesberger@mailbox.org>
+ * SuggestionListAdapter.java is part of NewPipe.
+ *
+ * NewPipe is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * NewPipe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with NewPipe.  If not, see <http://www.gnu.org/licenses/>.
  */
+
 public class SuggestionListAdapter extends CursorAdapter {
 
     private String[] columns = new String[]{"_id", "title"};