find_package(actionlib_msgs) mangles catkin_LIBRARIES variable

Derived from ros/geometry#51:

The Hydro `actionlib_msgs` package mangles the catkin_LIBRARIES variable if it is included with `find_package(actionlib_msgs)`. The CMake extra file must not depend on catkin: https://github.com/ros/common_msgs/blob/hydro-devel/actionlib_msgs/cmake/actionlib_msgs-extras.cmake.em#L2