The changes where obtained by running

  qtattributionsscanner -output-format json

in the sources of both Qt 5.12.3 and Qt 5.13.0 checkouts, and diff'ing
these.

Task-number: QTBUG-75417
Change-Id: I86cc4cd528284644368620a150de70791f8f8b52
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>