Add link.dart hook #303

Job	Run time
build (ubuntu, stable, native_assets_builder, true)	56s
build (ubuntu, stable, native_assets_cli, true)	1m 49s
build (ubuntu, stable, native_toolchain_c, true)	2m 2s
build (ubuntu, dev, native_assets_builder, true)	29s
build (ubuntu, dev, native_assets_cli, true)	22s
build (ubuntu, dev, native_toolchain_c, true)	20s
build (macos, stable, native_assets_builder, true)	2m 15s
build (macos, stable, native_assets_cli, true)	3m 22s
build (macos, stable, native_toolchain_c, true)	4m 21s
build (windows, stable, native_assets_builder, true)	1m 34s
build (windows, stable, native_assets_cli, true)	2m 17s
build (windows, stable, native_toolchain_c, true)	3m 41s
coverage-finished	0s
	23m 28s

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