Generally run all tests in sapi folder by default

Turned out that sapi/phpdbg actually wasn't explicitly included as sapi folders were individually selected

run-tests.php

@@ -884,7 +884,7 @@ $exts_skipped = 0;
 $ignored_by_ext = 0;
 sort($exts_to_test);
 $test_dirs = array();
-$optionals = array('tests', 'ext', 'Zend', 'ZendEngine2', 'sapi/cli', 'sapi/cgi', 'sapi/fpm');
+$optionals = array('tests', 'ext', 'Zend', 'sapi');
 
 foreach($optionals as $dir) {
 	if (@filetype($dir) == 'dir') {