Log Message:
Update wip/libxfce4util to 4.8.2.

pkgsrc changes:
- adjust bl3.

Upstream changes:

4.8.2
=====
- Change the version string to 4.8.
- Fixed incorrect assertion in xfce_strjoin (bug #7122).
- Fix "empty declaration" compiler warnings.
- Update FSF address and add missing licenses.
- Fix undef in libxfce4util.h header.
- Remove the internal slice allocator macros.
- Use chain to free slice instead of a loop.
- Translation updates (ko, ru, sk, zh_CN, nl).