cp from master: Docs build: add proper clearsilver comment tag

Add proper clearsilver comment tag to avoid printing comments in html.
Fix has been successfully submitted in master and oc-support-26.0-dev,
and affects doc files only.

Original change-Id: Id52b224359a2f9e42de6f45f1e996c84246f6cf5
Test: make ds-docs
Bug: 64123587

Change-Id: I4e7057bce6925818f2a6d18c6de53a37513f8530
1 file changed