bug#8576: 23.2; js-mode doesn't support multi-line variable declarations

[Dmitry Gutov]

Here is a function I wrote to properly indent multiline declarations in 
another package:

https://github.com/mooz/js2-mode/blob/master/js2-mode.el#L9917

It is kinda ugly, but it's been working reliably for me for some time 
now, and it doesn't rely on anything specific to js2-mode.

I have a CA signed, so it's fair game.

Dmitry.