cmake CMAKE_IGNORE_PATH examples

AcademySoftwareFoundation/OpenImageIO CMakeLists.txt :211 

list (APPEND CMAKE_IGNORE_PATH
              "${_prefix}"
              "${_prefix}/lib"
              "${_prefix}/bin"
              "${_prefix}/include"
             )

luvit/luv cmake/Modules/FindLua.cmake :183 

list(APPEND CMAKE_IGNORE_PATH "${LUA_INCLUDE_DIR}")