[i18n] Locales upstream

[David Zbytovsky]

Hello,
I've updated Horde/IMP/Turba PO files. What exactly should
I do to track those files in upstream?
        
H 4.0.13: locale/cs/LC_MESSAGES/horde.po
I 5.0.18: imp/locale/cs/LC_MESSAGES/imp.po
T 3.0.11: turba/locale/cs/LC_MESSAGES/turba.po
        
BR,
David