I've tried building the docs in tools/perf/Documentation/ , and after
that `git status` showed dozen of untracked htmls. Let's ignore them.
Signed-off-by: NKirill Smelkov <kirr@mns.spb.ru>
LKML-Reference: <1253790022-10300-1-git-send-email-kirr@mns.spb.ru>
Signed-off-by: NIngo Molnar <mingo@elte.hu>