time: remote debugging with Travis!!

* lib/posix/compat.lua (clock_getres): Fix if guard for
undefined clock_getres.
(clock_gettime): Fix indentation.
* specs/psoix_time_spec.yaml (clock_getres, clock_gettime): Use
prototype instead of type to get metatable _type!

Signed-off-by: Gary V. Vaughan <gary@gnu.org>