* gnu/packages/mate.scm (libmateweather): Update to 1.26.1.
[source]: Add libmateweather-use-TZDIR.patch.
[inputs]: Replace tzdata with tzdata-for-tests.
[arguments]: Set TZDIR, ignore test failure for 'check-timezones.sh'.
* gnu/packages/patches/libmateweather-use-TZDIR.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
Co-authored-by: 宋文武 <iyzsong@member.fsf.org>
