D5766: Change default pkgconfig install path for FreeBSD

[Kevin Funk]

kfunk requested changes to this revision.
This revision now requires changes to proceed.

REPOSITORY
  R240 Extra CMake Modules

REVISION DETAIL
  https://phabricator.kde.org/D5766

To: tcberner, #freebsd, apol, kfunk
Cc: kfunk, #frameworks, #build_system