Remove test-unit from hack/make
Remove test-unit from hack/make

Also remove the test flag from pkg/term and jsut checkuid directly.
Fixed a problem with a pkg/term test that was leaving the terminal in a bad
state.

Signed-off-by: Daniel Nephin <6347c07ae509164cffebfb1e2a0d6ed64958db19@docker.com>

moby/term