Revert "Release Qt UI Tools library under BSD license"

The license was originally changed from LGPL to BSD because
the Qt UI Tools library was built statically by default. We will
revert this in a follow-up commit.

This reverts commit 909a00a4

.

Change-Id: Id1d24429d633688b537fcf90b53ff55d0ccd28fc
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>