editors/xvile: Update from version 9.7 to 9.8

This package uses the distinfo and patches from editors/vile which was
recently updated to version 9.8.  Unfortunately it doesn't use a
common makefile so there was a version mismatch.  In the end, it didn't
matter because the PLIST had to be significantly modified as well.

These patches move xvile to version 9,8 and fixes build on DragonFly as
a side benefit.

(marino)