make build-deb complains about node missing on next

[srh]

If you run make build-deb DEB_RELEASE=... you'll get a complaint that node is missing.

This is almost certainly related to my recent changes making web_assets.cc precompiled, so that Node isn't an immediate build dependency.

Only affects the next branch (not 2.4.x).

[gabor-boros]

@srh since 2.5 will be created from 2.4 (if I understand correctly) upon a breaking change, this issue is not valid anymore as the next branch became the snapshot of that work done there and "abandoned", right?

[srh]

Right. We'll have to avoid this issue if/when cherry-picking from next. Closing.