Add dependency check for quickwidgets

If not, there will be an error when building with -no-opengl option:
"Project ERROR: Unknown module(s) in QT: quick-private"
The quickwidgets module depends on qt quick module, and qt quick
module depends on opengl.

Change-Id: If74b5582bdd96ed19ec10dbc534d02146717bc08
Reviewed-by: Liang Qi <liang.qi@digia.com>