docs: add support for meta description in the doclava <head>;
docs can optionally add a page.metaDescription definition to the document
HDF data (above the @jd:body).
Change-Id: I6e29f9b409e5c4adca5dfd7e78525f9752ca3bc9
diff --git a/res/assets/templates/head_tag.cs b/res/assets/templates/head_tag.cs
index 31393a8..a341c8e 100644
--- a/res/assets/templates/head_tag.cs
+++ b/res/assets/templates/head_tag.cs
@@ -1,5 +1,8 @@
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+<?cs if:page.metaDescription ?>
+<meta name="Description" content="<?cs var:page.metaDescription ?>">
+<?cs /if ?>
<link rel="shortcut icon" type="image/x-icon" href="<?cs var:toroot ?>favicon.ico" />
<title>
<?cs if:page.title ?>
