cmake LERC examples

InsightSoftwareConsortium/ITK Modules/ThirdParty/TIFF/src/itktiff/cmake/LERCCodec.cmake :29 

find_package(LERC)

Ravbug/UnityHubNative wxWidgets/src/tiff/cmake/LERCCodec.cmake :28 

find_package(LERC)

Kitware/VTK ThirdParty/tiff/vtktiff/cmake/LERCCodec.cmake :29 

find_package(LERC)