#208 Reduce exec time of PROCESS tests

[Miyakawa Taku]

PROCESS tests are taking too much time launching Kink interpreter.

...
src/test/kink/PROCESS_test.kn; process; .stdin; get pipe : Success 15.588 sec
src/test/kink/PROCESS_test.kn; process; .stdin; cannot get pipe if source is not pipe : Success 13.781 sec
src/test/kink/PROCESS_test.kn; process; .stdout; get pipe : Success 13.612 sec
src/test/kink/PROCESS_test.kn; process; .stdout; cannot get pipe if not redirected to pipe : Success 13.654 sec
src/test/kink/PROCESS_test.kn; process; .stderr; get pipe : Success 15.752 sec
src/test/kink/PROCESS_test.kn; process; .stderr; cannot get pipe if destination is not pipe : Success 15.445 sec
src/test/kink/PROCESS_test.kn; process; .stderr; cannot get pipe if stderr is redirected to stdout : Success 15.306 sec
src/test/kink/PROCESS_test.kn; process; .wait; exit cont : Success 13.626 sec
...

It can be reduced by using commands other than Kink interpreter like bash.

[Miyakawa Taku]

Working on sf00208-improve-exec-time-PROCESS-tests

[Miyakawa Taku]

Closed by [b42c84]