Fix target for generating empty man pages when configured with --disable-doc. - Copy the ronn file to the man location when doc is disabled. - Markdown is better than empty.
Fix target for generating empty man pages when configured with --disable-doc.
- Copy the ronn file to the man location when doc is disabled.
- Markdown is better than empty.

Change-Id: I2fc3a97fe9633b0af84a45004d3784ac0ed36deb
Signed-off-by: Christopher M. Cantalupo <9cf3ecca60a3dd7112ab0e7250bedb8a752e3958@intel.com>

geopm/geopm,sssylvester/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,sssylvester/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,sssylvester/geopm,sssylvester/geopm,geopm/geopm,geopm/geopm