QtIFW

Enable logging categories as an installer option.

Now by default all categories are disabled.
They get enabled only in verbose mode.
Verbose mode enables all categories by default.
Categories can be filtered using logging-rules option.

Change-Id: I9324826a6e2d7a746e3d7369747fcd31a42b84b6
Reviewed-by: Karsten Heimrich <karsten.heimrich@theqtcompany.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>