wmbiff: GnuTLS LZO support was removed in version 3.0.0

Patch by Andreas Metzler <ametzler@debian.org>.  Obtained from:
http://sources.debian.net/src/wmbiff/0.4.27-2.3/debian/patches/15_no_more_LZO.diff/

For more information, see:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=638736