Skip build of linquist, assistant, designer, pixeltool,
qdbusviewer and distancefieldgenerator on disabled features.

This also fixes build with -no-feature-action configuration.

Change-Id: I0b7de9bae9c33ddb47d83ed577ec0e404bde360d
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>