[3.7] bpo-20087: Update locale alias mapping with glibc 2.27 supported locales. (GH-6708) (GH-6713)

(cherry picked from commit cedc9b74202d8c1ae39bca261cbb45d42ed54d45)

Co-authored-by: Serhiy Storchaka <storchaka@gmail.com>
3 files changed