Add CSS 2.1 test suite metadata for z-index reftests.
--- a/layout/reftests/z-index/z-index-1.html
+++ b/layout/reftests/z-index/z-index-1.html
@@ -1,11 +1,16 @@
<!DOCTYPE HTML>
<html>
<head>
+ <title>CSS 2.1 Test Suite: z-index</title>
+ <link rel="author" title="Robert O'Callahan" href="mailto:robert@ocallahan.org" />
+ <link rel="author" title="Mozilla Corporation" href="http://mozilla.com/" />
+ <link rel="help" href="http://www.w3.org/TR/CSS21/visuren.html#z-index" />
+ <meta name="flags" content="" />
<style>
.container {
position:absolute;
width:400px;
height:100px;
font-size:0;
background-color:yellow;
line-height:0;