rteval: fixed manpage to include stress-ng header

Previously the manpage stress-ng options were listed with cyclictest options.
This patch puts them in a STRESS-NG section to more closely mirror
rteval help

Signed-off-by: Anubhav Shelat <ashelat@redhat.com>
- Rewrote the commit message a bit.
Signed-off-by: John Kacur <jkacur@redhat.com>
1 file changed