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

Merges [25925] to the 3.7 branch.

Reverses a regression from [25664].

props calin.
fixes #25705.

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git-svn-id: http://core.svn.wordpress.org/branches/3.7@25885 1a063a9b-81f0-0310-95a4-ce76da25c4cd