Consider checking in a static fs hierarchy for tests

[jpo-joyent]

Currently, go test runs against your local machine, and some tests fail depending on what hardware that machine actually has.

It might be a good idea to check in a single fs hierarchy to run tests against (using GHW_CHROOT), and could also serve as a handy reference of file formats for contributors without access to various hardware.

[jaypipes]

I think this is an excellent idea, @jpo-joyent. I'll try to modify our test setup accordingly and make use of the GHW_CHROOT functionality to place a temporary filesystem down for the tests to use.