textproc/fop: Update to 2.2

• Set LICENSE

Changes: https://xmlgraphics.apache.org/fop/changes.html

PR: 219109
Submitted by: mail_of_sergey@mail.ru
Approved by: garga (mentor), geoff@sea-incorporated.com (maintainer)
Differential Revision: https://reviews.freebsd.org/D10977