BUG: Recognize Clang compiler in FindCppcheck.cmake
BUG: Recognize Clang compiler in FindCppcheck.cmake

Change-Id: Ic87a9bc3d10abc4050142c108ee031afc5e08004

cdeepakroy/TubeTK,KitwareMedical/TubeTK,LucasGandel/TubeTK,aylward/ITKTubeTK,LucasGandel/TubeTK,sumedhasingla/TubeTK,aylward/ITKTubeTK,thewtex/TubeTK,cdeepakroy/TubeTK,matthieuheitz/TubeTK,matthieuheitz/TubeTK,sumedhasingla/TubeTK,matthieuheitz/TubeTK,KitwareMedical/TubeTK,KitwareMedical/ITKTubeTK,LucasGandel/TubeTK,aylward/ITKTubeTK,aylward/ITKTubeTK,sumedhasingla/TubeTK,KitwareMedical/ITKTubeTK,thewtex/TubeTK,cdeepakroy/TubeTK,cdeepakroy/TubeTK,KitwareMedical/ITKTubeTK,thewtex/TubeTK,KitwareMedical/ITKTubeTK,KitwareMedical/TubeTK,sumedhasingla/TubeTK,KitwareMedical/TubeTK,matthieuheitz/TubeTK,LucasGandel/TubeTK,thewtex/TubeTK