Avoid shell for proc_terminate() test

Otherwise we're sending the signal to the shell, not the sleep
process, and it will continue sleeping.

This also illustrates a minor issue without our array proc_open()
support: We don't preserve the passed arguments in the
proc_get_status() output.

ext/standard/tests/general_functions/proc_open02.phpt

@@ -10,7 +10,7 @@ if (getenv('SKIP_SLOW_TESTS')) echo 'skip slow test';
 $ds = array(array('pipe', 'r'));
 
 $cat = proc_open(
-    '/bin/sleep 2',
+    ['/bin/sleep', '2'],
     $ds,
     $pipes
 );
@@ -34,7 +34,7 @@ echo "Done!\n";
 bool(true)
 array(8) {
   ["command"]=>
-  string(12) "/bin/sleep 2"
+  string(10) "/bin/sleep"
   ["pid"]=>
   int(%d)
   ["running"]=>
@@ -53,7 +53,7 @@ array(8) {
 bool(true)
 array(8) {
   ["command"]=>
-  string(12) "/bin/sleep 2"
+  string(10) "/bin/sleep"
   ["pid"]=>
   int(%d)
   ["running"]=>