security/sssd2: fix detection of krb5

Because security/krb5 has bumped version, it is not well detected
and make this port on packaging.

This adds a patch to update the detection of krb 1.22 that is not
on the original sources.

PR:	288708
Approved by:	0mp (mentor)
Approved by:	kevans
Approved by:	portmgr blanket (build fix)
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D51813