ps abort causes problems in testsuite

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.

ps/global.c

@@ -515,5 +515,5 @@ catastrophic_failure(const char *filename,
 		     const char *message)
 {
   error_at_line(0, 0, filename, linenum, message);
-  abort();
+  exit(EXIT_FAILURE);
 }

testsuite/config/unix.exp

@@ -40,6 +40,7 @@ proc expect_pass { testname reg } {
     expect {
         -re "$reg" { pass "$testname" }
         default { fail "$testname" }
+		timeout { fail "$testname" }
     }
 }