Add systemtests for host and target scripts #66

Job	Run time
build (dss-sdk-build) / build-aws	9m 39s
lint (pycodestyle) / build-aws	4m 7s
lint (shellcheck) / build-aws	4m 40s
build (dss-sdk-unit-test) / build-aws	8m 12s
scan / build-aws	9m 8s
	35m 46s

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