not sure how to fix locale packaging

[Neal Becker]

mercurial has hard-wired to install .mo files under python_sitearch, and 
i18n.py has hard-coded to look there.

On fedora, find-lang.sh is usually used to find these files, but expects to 
find them in e.g., /usr/share/locale

Not sure what's the best way to fix this.  Either leave .mo files where 
mercurial expects them, and replace find-lang.sh, or move them to 
/usr/share/locale and patch i18n.py