[Pkg-javascript-devel] Bug#862887: 14 tests fail gulp

[Xavier]

This outdated version of gulp depends on (at least) outdated
node-vinyl-fs and node-first-chunk-stream and unpackaged
node-glob-watcher. That's why tests fail, this reveals that
"auto-rebuild" feature is unusable. I hope nothing else is broken.

To avoid uploading a major change during Buster freeze, I packaged gulp
with tests related to Gulp.watch() disabled and with a patch to throw an
error that points here if vinyl-fs.watch() is called.

Cheers,
Xavier