Remove .post files only for passing tests

This allows the sh script for failing tests with --POST-- to work

Author: morrisonlevi

run-tests.php

@@ -1994,8 +1994,6 @@ function run_test($php, $file, $env)
 		}
 	}
 
-	@unlink($tmp_post);
-
 	$leaked = false;
 	$passed = false;
 
@@ -2207,6 +2205,10 @@ function run_test($php, $file, $env)
 		$restype[] = 'WARN';
 	}
 
+	if ($passed) {
+		@unlink($tmp_post);
+	}
+
 	if (!$passed) {
 		if (isset($section_text['XFAIL'])) {
 			$restype[] = 'XFAIL';