linuxcnc script: add -r for runtests

This tells the script to not mess with stdout and stderr.  This is
important for runtests that use a custom "ui" to exercise something.
tests: make halui-jogging report its problems

Also turn off this test's debug output since it's not portable between
i386 and amd64.  Fortunately the output of the "ui" is all we really need.
halui-jogging test: let the test script choose pass/fail

This commit makes test success independent of output, since there is
some ambiguity in test output (unexpected realtime delays, 32/64-bit
float rounding errors, etc).

If test.sh fails, the test fails (just like before).  If test.sh succeeds,
the test passes no matter what the output was.
reenable t0 tests
turn on output from all "unreliable" tests and unskip