qml | Fix pragma reformatting

After this change reformatter test (tests/auto/qml/reformatter/tst_reformatter)
starts to work correctly for singleton example (qmlsingleton.qml)

Change-Id: Ia0561aa8b920fc5c62a8dea93341721f37b68dd8
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/libs/qmljs/qmljsreformatter.cpp

@@ -531,6 +531,8 @@ protected:
     bool visit(UiPragma *ast) override
     {
         out("pragma ", ast->pragmaToken);
+        out(ast->name.toString());
+        newLine();
         return false;
     }