testing: For testing builds. #2489

Job	Run time
contract-tests	2m 41s
build-test	6m 0s
build-test-curl	6m 3s
build-test-client-mac	13m 16s
build-test-client-mac-curl	6m 49s
contract-tests-curl	3m 0s
build-test-client-windows-curl	9m 16s
build-test-client-windows	16m 37s
	1h 3m 42s

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