Correct and complete doc about pkg-config
Correct and complete doc about pkg-config

  * doc/html/hppdoc_autotools.html.

laas/hpp-doc,jmirabel/hpp-doc,florent-lamiraux/hpp-doc,florent-lamiraux/hpp-doc,jmirabel/hpp-doc,laas/hpp-doc,humanoid-path-planner/hpp-doc,humanoid-path-planner/hpp-doc