During the focal migration, npm jobs in some plugins requires
extra packages like libfontconfig. They are specific to npm jobs,
so it would be nice to have a dedicated bindep profile (as 'test'
profile is too general for this purpose). horizon job definition
provides a common layer for the npm jobs, so we decide to add a
task to the job definition in the horizon repo. Each plugin can
add packages with 'nodejs' profile in its bindep.txt if needed.
Change-Id: I5eac6b1c724e9b21a78fda5ba41002224dd9b356
5dd94f6598