[native_assets_cli] Example use `assets/` directory #839

Job	Run time
build (ubuntu, stable, native_assets_builder, false)	5m 33s
build (ubuntu, stable, native_assets_cli, false)	2m 17s
build (ubuntu, stable, native_toolchain_c, false)	3m 4s
build (ubuntu, dev, native_assets_builder, false)	5m 14s
build (ubuntu, dev, native_assets_cli, false)	2m 42s
build (ubuntu, dev, native_toolchain_c, false)	2m 2s
build (macos, stable, native_assets_builder, false)	6m 20s
build (macos, stable, native_assets_cli, false)	2m 3s
build (macos, stable, native_toolchain_c, false)	2m 29s
build (macos, dev, native_assets_builder, false)	5m 40s
build (macos, dev, native_assets_cli, false)	2m 18s
build (macos, dev, native_toolchain_c, false)	2m 54s
build (windows, stable, native_assets_builder, false)	7m 51s
build (windows, stable, native_assets_cli, false)	2m 31s
build (windows, stable, native_toolchain_c, false)	4m 28s
build (windows, dev, native_assets_builder, false)	7m 30s
build (windows, dev, native_assets_cli, false)	3m 1s
build (windows, dev, native_toolchain_c, false)	4m 45s
coverage-finished	3s
	1h 12m 45s

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