roslib: add rospack to CATKIN_DEPENDS (#128)
roslib: add rospack to CATKIN_DEPENDS (#128)

This fixes a linker issue that can arise on some build environments:

    ld: warning: librospack.so, needed by /opt/ros/indigo/lib/libroslib.so, not found (try using -rpath or -rpath-link)
    /opt/ros/indigo/lib/libroslib.so: undefined reference to `rospack::ROSPack::run(std::string const&)'
    collect2: error: ld returned 1 exit status

ros/ros,ros/ros,ros/ros