Bug 1619816 - Add PYTHONIOENCODING to desktop_l10n.py; r=glandium

Differential Revision: https://phabricator.services.mozilla.com/D65272

--HG--
extra : moz-landing-system : lando

testing/mozharness/scripts/desktop_l10n.py

@@ -370,6 +370,7 @@ class DesktopSingleLocale(LocalesMixin, AutomationMixin,
     def make_installers(self, locale):
         """wrapper for make installers-(locale)"""
         env = self.query_l10n_env()
+        env['PYTHONIOENCODING'] = 'utf-8'
         self._copy_mozconfig()
         dirs = self.query_abs_dirs()
         cwd = os.path.join(dirs['abs_locales_dir'])