all: change `hpp::fcl::` namespace to `coal::`

include/hpp/fcl/BV/AABB.h

include/hpp/fcl/BV/BV.h

include/hpp/fcl/BV/BV_node.h

include/hpp/fcl/BV/OBB.h

include/hpp/fcl/BV/OBBRSS.h

include/hpp/fcl/BV/RSS.h

include/hpp/fcl/BV/kDOP.h

include/hpp/fcl/BV/kIOS.h

include/hpp/fcl/BVH/BVH_front.h

include/hpp/fcl/BVH/BVH_internal.h

include/hpp/fcl/BVH/BVH_model.h

include/hpp/fcl/BVH/BVH_utility.h

include/hpp/fcl/broadphase/broadphase.h

include/hpp/fcl/broadphase/broadphase_SSaP.h

include/hpp/fcl/broadphase/broadphase_SaP.h

include/hpp/fcl/broadphase/broadphase_bruteforce.h

include/hpp/fcl/broadphase/broadphase_callbacks.h

include/hpp/fcl/broadphase/broadphase_collision_manager.h

.../broadphase/broadphase_continuous_collision_manager-inl.h

.../fcl/broadphase/broadphase_continuous_collision_manager.h