fix broken download buttons, make a[name] offset apply only to reference docs

Change-Id: I44421d90c335e0fcb4b35d8f568f9775a84b41ea

tools/droiddoc/templates-sdk/assets/css/default.css

@@ -4207,7 +4207,7 @@ EndColorStr='#ececec');
 }
 
 /* offset the <a name=""> tags to account for sticky nav */
-a[name] {
+body.reference a[name] {
   visibility: hidden;
   display: block;
   position: relative;