The testsuite failed on archlinux which has sleep in /usr/bin/
instead of /bin/ directory. This commit will make expect to use
$PATH to determine where sleep is.
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
Under certain circumstances, using abort() when either make check
or make distcheck puts ps into an infinite loop around the
function catastrophic_failure() in ps and the C library raise
and abort functions.
Using exit removes this problem and does almost the same thing.
