cmake WEBP_HAVE_SSE2 examples

axmolengine/axmol 3rdparty/webp/CMakeLists.txt :20

target_compile_definitions(${target_name} PRIVATE WEBP_HAVE_SSE2=1)

axmolengine/axmol 3rdparty/webp/CMakeLists.txt :23

target_compile_definitions(${target_name} PRIVATE WEBP_HAVE_SSE2=1)