net/asterisk{20,22}: Fix build with WITH_PIE

Upstream commit f82393d brokes build options handling for
bundled pjproject. That was fixed later by 78b7c4e.
Temporary use this patch in our ports until next release.

PR: 298207
Approved by: osa, vvd (Mentors, implicit)
Co-authored-by: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl>
Sponsored by: FLEX-IT LLC
MFH: 2026Q3

(cherry picked from commit a2bad65a40f2b195abba4250d3a6a8f12aef1110)