Fix QifExporter's log tag

Author: rivaldi8

app/src/main/java/org/gnucash/android/export/qif/QifExporter.java

@@ -62,7 +62,7 @@ public class QifExporter extends Exporter{
      */
     public QifExporter(ExportParams params){
         super(params, null);
-        LOG_TAG = "OfxExporter";
+        LOG_TAG = "QifExporter";
     }
 
     /**
@@ -72,7 +72,7 @@ public QifExporter(ExportParams params){
      */
     public QifExporter(ExportParams params, SQLiteDatabase db){
         super(params, db);
-        LOG_TAG = "OfxExporter";
+        LOG_TAG = "QifExporter";
     }
 
     @Override