message: Include CPack only when explictly packaging
  Including CPack without the additional packaging information creates unused project files, and can potentially cause issues for projects including Flatbuffers that also use CPack.
diff: @@ -619,9 +619,10 @@ if(UNIX)
  # Use of CPack only supported on Linux systems.
  if(FLATBUFFERS_PACKAGE_DEBIAN)
  include(CMake/PackageDebian.cmake)
  + include(CPack)
  endif()
  if (FLATBUFFERS_PACKAGE_REDHAT)
  include(CMake/PackageRedhat.cmake)
  - endif()
  include(CPack)
  endif()
  +endif()
  