testsuite: ship testsuite/rootfs unzipped
The current configuration is dumb in any number of ways:
1) If the rationale was for space savings, it works the opposite- the
git repo gets more bloated because we are adding binary compressed
blobs that share little in common with their parent, and anyone that
wants to run the test suite has to unzip it anyway.
2) It is a pain in the butt to add new tests, and not accidentally lose
any new rootfs you built in the directory.
3) `git status` won't help you if you are tweaking files in the rootfs
and don't know they have been changed, or if some test did that and
you couldn't detect it.
4) `git log` won't help you find out what is changing in the rootfs test
directory itself when changes are made to the binary blob, such as
new files being added or even existing files being tweaked.
5) The files just aren't that big anyway- 2.7MB unzipped.
133 files changed