Skia lib build on macOS

build.sh

bin/gn gen out/release \
          --args="is_official_build=true \
              skia_use_libjpeg_turbo_decode=false \
              skia_use_libjpeg_turbo_encode=false \
              extra_cflags_cc=[\"-frtti\"] \
              skia_use_system_libwebp = false \
              skia_use_system_harfbuzz = false \
              skia_use_system_libpng = false \
              is_component_build = false \
          "
ninja -C out/release skia