Reposition some aliases in holidays.el.

Reposition some aliases in holidays.el.
* lisp/calendar/holidays.el (general-holidays, oriental-holidays)
(local-holidays, other-holidays, hebrew-holidays, christian-holidays)
(islamic-holidays, bahai-holidays, solar-holidays): Move aliases before
the definitions of their targets.

(The position doesn't actually matter so long as the aliases are autoloaded).