The changes where obtained by running

qtattributionsscanner -output-format json

in the sources of both Qt 5.12.2 and Qt 5.12.3 checkouts, and diff'ing
these.

Fixes: QTBUG-75026
Change-Id: If1b8b44c45333d33e8b163639c6d6a0e81798d53
Reviewed-by: Jani Heikkinen <jani.heikkinen@qt.io>