Add s7 submodule #2

Job	Run time
build (linux, single, x86_64, template_debug, ubuntu-20.04)	8m 27s
build (windows, single, x86_32, template_debug, windows-latest)	4m 18s
build (windows, single, x86_64, template_debug, windows-latest)	3m 58s
build (macos, single, universal, template_debug, macos-latest)	8m 17s
build (android, single, arm64, template_debug, ubuntu-20.04)	7m 20s
build (android, single, arm32, template_debug, ubuntu-20.04)	7m 26s
build (android, single, x86_64, template_debug, ubuntu-20.04)	7m 34s
build (android, single, x86_32, template_debug, ubuntu-20.04)	6m 31s
build (ios, single, arm64, template_debug, macos-latest)	50s
build (web, single, wasm32, template_debug, ubuntu-20.04)	11m 14s
build (linux, single, x86_64, template_release, ubuntu-20.04)	8m 19s
build (linux, double, x86_64, template_debug, ubuntu-20.04)	8m 19s
build (windows, double, x86_32, template_debug, windows-latest)	4m 18s
build (windows, double, x86_64, template_debug, windows-latest)	3m 57s
build (macos, double, universal, template_debug, macos-latest)	9m 44s
build (android, double, arm64, template_debug, ubuntu-20.04)	7m 52s
build (android, double, arm32, template_debug, ubuntu-20.04)	6m 21s
build (android, double, x86_64, template_debug, ubuntu-20.04)	7m 38s
build (android, double, x86_32, template_debug, ubuntu-20.04)	6m 25s
build (ios, double, arm64, template_debug, macos-latest)	48s
build (web, double, wasm32, template_debug, ubuntu-20.04)	11m 13s
build (linux, double, x86_64, template_release, ubuntu-20.04)	8m 39s
merge	0s
	2h 29m 28s

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