[CMake] Add copyright to ROOT cmake/modules files.

cmake/modules/CMakeMacroParseArguments.cmake

cmake/modules/CTestCustom.cmake

cmake/modules/CaptureCommandLine.cmake

cmake/modules/CheckAssembler.cmake

cmake/modules/CheckCompiler.cmake

cmake/modules/CheckIntrinsics.cmake

cmake/modules/FindAfterImage.cmake

cmake/modules/FindAlien.cmake

cmake/modules/FindCFITSIO.cmake

cmake/modules/FindDCAP.cmake

cmake/modules/FindDPM.cmake

cmake/modules/FindDavix.cmake

cmake/modules/FindFFTW.cmake

cmake/modules/FindFTGL.cmake

cmake/modules/FindGEANT4.cmake

cmake/modules/FindGEANT4VMC.cmake

cmake/modules/FindGFAL.cmake

cmake/modules/FindGraphviz.cmake

cmake/modules/FindLZ4.cmake

cmake/modules/FindLZMA.cmake