Makefile: add `update-xy` and `compile-xy` targets, for symmetry with `check-xy` and `stats-xy`.
Also, make sure that multiple locales can be specified with the `locale` variable, like in `make stats update locale="fr de"`.
Expand the usage information accordingly.
Authored by: cboos 2010-04-20
Parent: [r9494]
Child: [r9496]