cmake OSL examples

AcademySoftwareFoundation/OpenShadingLanguage testsuite/example-batched-deformer/CMakeLists.txt :27 

find_package (OSL REQUIRED)

AcademySoftwareFoundation/MaterialX CMakeLists.txt :219 

find_package(OSL QUIET)

appleseedhq/appleseed CMakeLists.txt :331 

find_package (OSL REQUIRED CONFIG)

PixarAnimationStudios/OpenUSD cmake/defaults/Packages.cmake :306 

find_package(OSL REQUIRED)