Unbreak languagepack target (package-rename and ure targets are still
broken).

plist fixes:

• Don't add @dirrm to generated plist
• Don't add a blank line to generated plist
• Don't truncate ${TMPPLIST} (from mat@)
• Don't add @dirrm to generated plist
• Add @dir for empty directories

Makefile diff reduction vs. upcoming openoffice-devel update.

Differential Revision: https://reviews.freebsd.org/D1561
Approved by: mat (mentor)