Fix Qt configure line to make a non-install build

You almost never want to have the default installation path for your
static Qt.

Also remove the '-opensource' part, so people are asked which license
they have / use.

Change-Id: Ifefe9c7256aaf7aafa8104bff8adac02584d0a81
Reviewed-by: Niels Weber <niels.weber@digia.com>
Reviewed-by: Karsten Heimrich <karsten.heimrich@digia.com>
Silence warning, we know what we are doing (-Wunused-value).

Change-Id: I3a944e0ff38b10b3440fa3c3dfcce378f284aacc
Reviewed-by: Niels Weber <niels.weber@digia.com>