japanese/kon2-16dot: fix build with base system PIE default

PIE with static libraries is currently unsupported in the FreeBSD base
system. Explicitly disable PIE for in affected ports for now.

Emailed maintainer for approval, no objection.

PR: 253275 [exp-run]
Submitted by: Dawid Gorecki <dgr@semihalf.com>
Approved by: lwhsu
Differential Revision: https://reviews.freebsd.org/D28868