update check in generated pkgConfig.cmake files to work independent of cmake policy CMD0012 (#452)
update check in generated pkgConfig.cmake files to work independent of cmake policy CMD0012 (#452)

scpeters/catkin,thaddeustaylor/catkin,beni55/catkin,harmishhk/catkin,meyerj/catkin,meyerj/catkin,thaddeustaylor/catkin,thaddeustaylor/catkin,jack-oquin/catkin,shyamalschandra/catkin,asmodehn/catkin,asmodehn/catkin,beni55/catkin,harmishhk/catkin,scpeters/catkin,jack-oquin/catkin,shyamalschandra/catkin,ros/catkin,wkentaro/catkin,wkentaro/catkin,wkentaro/catkin,ros/catkin,jack-oquin/catkin,ros/catkin,harmishhk/catkin,shyamalschandra/catkin,meyerj/catkin,beni55/catkin,scpeters/catkin,asmodehn/catkin