[ament_cmake_copyright] Add file exclusion support (#328)
[ament_cmake_copyright] Add file exclusion support (#328)

* [ament_cmake_copyright] Add file exclusion support

In the `ament_copyright` CMake function, the optional list
argument `EXCLUDE` can now be used as an exclusion specifier.

Signed-off-by: Abrar Rahman Protyasha <6764efe3f81be0ed6408c793ffae84bd7fbe557a@u.rochester.edu>

* [ament_cmake_copyright] Fix function header typo

Remove reference to `cppcheck` in the `EXCLUDE` arg description.

Signed-off-by: Abrar Rahman Protyasha <6764efe3f81be0ed6408c793ffae84bd7fbe557a@u.rochester.edu>
ament/ament_lint,ament/ament_lint,ament/ament_lint