editors/xvile: update to 9.8v

While here, remove CONFLICTS_INSTALL. In 9.8v, the sources include
updated makefiles which make the two ports nonconflicting. That is
done by using sed-scripts within the makefiles to rename files owned
by xvile (along with some updates to the latter's plist file).

Changelog: https://invisible-island.net/vile/CHANGES.html#v9_8v

PR:		260382
Reported by:	Thomas E. Dickey <dickey@invisible-island.net> (maintainer)