COMP: Only add -Wno-unused-local-typedefs for GCC.
COMP: Only add -Wno-unused-local-typedefs for GCC.

Not found on clang 3.3.

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