In update_option(), call the update_option hook before the DB update.

Reverses a regression from [25664].

props calin.
fixes #25705 for trunk.

Built from https://develop.svn.wordpress.org/trunk@25925


git-svn-id: http://core.svn.wordpress.org/trunk@25884 1a063a9b-81f0-0310-95a4-ce76da25c4cd