net/tigervnc-server: Use the same default fp for Xvnc as xorg-server

[hrs]

Summary

Xvnc uses "catalogue:${LOCALBASE}/share/fonts,built-ins" as the default
font path. It is different from x11-server/xorg-server's and confusing
because ${LOCALBASE}/share/fonts is not supposed to be a catalog font path.

This patch makes Xvnc use the standard fontpath + etc/X11/fontpath.d as
a catalog path.

While I'm here, changes to respect ${_MAKE_JOBS} the post-build target and
remove an extra strip(1) invocation have been added. The former prevented
the parallel build from working.

Test Plan

% xset q | grep -A1 ^Font

[meta]

LGTM. Thanks for your caring the port.