Silencing ostree-prepare-root

[Alex Kiernan <alex kiernan gmail com>]

I'm trying to completely silence my boot, one of the messages I've got left is:

  Examining ///ostree/boot.1/nano/c613fde731cc1c6fde4cb55b0f7c57eb2b9b9a493e8302c5e27aeb7575f6aaeb/0
  Resolved OSTree target to:
/ostree/deploy/nano/deploy/c0970c3d90379b6a869d55d1d2812f306dd591a814d8dae4636bdf16245b63a8.0

Parsing out an additional kernel command line parameter is obviously
easy, but is that a sensible approach? Picking say 'quiet' seems like
an obvious option, but any thoughts?

-- 
Alex Kiernan