Log Message:
xfce4-desktop: update to 4.14.4

Also address a pkglint warning, add BUILD_DEFS.

Change log:

4.14.4
======
- Fix Applications Menu memory leak (Bug #102)
- Translation Updates:
  Amharic, Arabic, Asturian, Basque, Belarusian, Danish, English
  (Australia), English (Canada), Greek, Icelandic, Indonesian,
  Interlingue, Norwegian Nynorsk, Occitan (post 1500), Portuguese,
  Romanian, Slovenian, Uyghur, Uzbek

4.14.3
======
- Avoid redundant calls to backdrop_changed_cb (Bug #16773)
- Fix memory leak when reconnecting DP monitor (Bug #16314)
- Fix transparent background color (Bug #16380)
- Do not insert hyphens at intra-word line breaks (Bug #16339)
- Translation Updates:
  Albanian, Amharic, Arabic, Armenian (Armenia), Asturian, Basque,
  Belarusian, Belarusian (Tarask), Bulgarian, Catalan, Chinese (China),
  Chinese (Hong Kong), Chinese (Taiwan), Croatian, Czech, Danish,
  Dutch, Eastern Armenian, English (Australia), English (Canada),
  English (United Kingdom), Estonian, Finnish, French, Galician,
  Georgian, German, Greek, Hebrew, Hungarian, Icelandic, Indonesian,
  Interlingue, Italian, Japanese, Kazakh, Korean, Lithuanian, Malay,
  Norwegian Bokmål, Norwegian Nynorsk, Occitan (post 1500), Persian
  (Iran), Polish, Portuguese, Portuguese (Brazil), Romanian, Russian,
  Serbian, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish,
  Ukrainian, Uyghur, Uzbek