Log Message:
xfce4-places-plugin: update to 1.8.1

Change log:

2019-08-11
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xfce4-places-plugin v1.8.1 released

* Cleanup old xfce4-popup-places code
* Fix uninitialized value
* Update the build system to be compliant with other plugins
* Updated translations: Amharic, Arabic, Asturian, Basque, Belarusian,
  Bulgarian, Catalan, Chinese (China), Chinese (Taiwan), Croatian, Czech,
  Danish, Dutch, English (Australia), English (United Kingdom), Finnish,
  Galician, German, Greek, Hebrew, Hungarian, Icelandic, Indonesian,
  Interlingue, Italian, Japanese, Kazakh, Korean, Latvian, Lithuanian, Malay,
  Norwegian Bokmål, Occitan (post 1500), Panjabi (Punjabi), Polish, Portuguese,
  Portuguese (Brazil), Romanian, Russian, Serbian, Slovak, Slovenian, Spanish,
  Swedish, Thai, Turkish, Uighur, Ukrainian, Urdu, Urdu (Pakistan)