xfce4-panel: Update version from 4.12.1 to 4.12.2

Release notes [1]:

> Release notes for 4.12.2
> ========================
> - Feature: Support for RandR's 'primary monitor'
> - Translation updates: Arabic, Asturian, Basque, Bengali, Bulgarian,
>   Catalan, Chinese (China), Chinese (Hong Kong), Chinese (Taiwan),
>   Croatian, Czech, Danish, Dutch (Flemish), English (Australia),
>   English (Great Britain), Estonian, Finnish, French, Galician,
>   German, Greek, Hebrew, Hungarian, Icelandic, Indonesian,
>   Italian, Japanese, Kazakh, Korean, Lithuanian, Malay,
>   Norwegian Bokmål, Norwegian Nynorsk, Occitan, Panjabi, Polish,
>   Portuguese, Portuguese (Brazilian), Romanian, Russian, Serbian,
>   Slovak, Slovenian, Spanish, Swedish, Telugu, Thai,
>   Turkish, Ukrainian, Uyghur, Vietnamese

[1] https://mail.xfce.org/pipermail/xfce-announce/2017-December/000564.html

xfce4-panel.be0

@@ -1,6 +1,6 @@
 #!/usr/bin/env beesh
 
-# BEE_VERSION xfce4-panel-4.12.1-1
+# BEE_VERSION xfce4-panel-4.12.2-0
 
 SRCURL[0]="http://archive.xfce.org/src/xfce/xfce4-panel/${PKGVERSION[2]}/xfce4-panel-${PKGVERSION}.tar.bz2"
 PATCHURL[0]="/src/mariux/beeroot/downloads/xfce4-panel.patch"