cmake builtin_interfaces examples

SteveMacenski/slam_toolbox CMakeLists.txt :26 

find_package(builtin_interfaces REQUIRED)

ZhenshengLee/ros2_shm_msgs CMakeLists.txt :19 

find_package(builtin_interfaces REQUIRED)

introlab/find-object CMakeLists.txt :426 

find_package(builtin_interfaces REQUIRED)