bug#14377: 24.3.50; patch: run a hook after `bookmark-write'

[Glenn Morris]

>> Of course, we could also install something like your patch, but the hook
>> functions will probably need access to the file name (which might turn into
>> a lexically scoped var any time).

Aren't matters of extensibility like this one reason why

http://www.gnu.org/software/emacs/emacs-paper.html#SEC15

favours dynamic binding?