... because the files are installed even when packaging is disabled.

Reviewed-by: kh1

Reviewed-by: kh1

Reviewed-by: kh1

Also allow absolute file paths for deployables.

Reviewed-by: kh1

Task-number: QTCREATORBUG-1614, QTCREATORBUG-1810
Reviewed-by: kh1

No difference in functionality yet.

Reviewed-by: kh1