Workaround rust-coreutils issue

Apertis uses rust-coreutils as a replacement of coreutils, however, it has some limitations. In this case, the date applet is unable to parse date string containing timezome, such as UTC. Since the new version of rust-coreutils sets the exit code on these cases, this situation aborts the installation of tzdata.

To avoid triggering an error, strip the UTC string from the date string.

infrastructure/apertis-issues#795

Signed-off-by: Walter Lozano walter.lozano@collabora.com