tests/test-locale.t

keyword: use `update_file_p1` instead of `normallookup`

This is the newer, more semantic API.

Differential Revision: https://phab.mercurial-scm.org/D11178

  $ LANG=nonexistent LC_ALL=nonexistent LANGUAGE=nonexistent hg version -q
  Mercurial Distributed SCM (version *) (glob)