Make the launcher also serve HostlibKeyProvisioningServer on vsock. #248

Job	Run time
build_attest_all (buildconfigs/key_xor_test_app.sh)	4m 34s
build_attest_all (buildconfigs/oak_client_android_app.sh)	25m 51s
build_attest_all (buildconfigs/oak_containers_agent.sh)	6m 47s
build_attest_all (buildconfigs/oak_containers_kernel.sh)	4m 50s
build_attest_all (buildconfigs/oak_containers_orchestrator.sh)	8m 31s
build_attest_all (buildconfigs/oak_containers_stage1.sh)	6m 42s
build_attest_all (buildconfigs/oak_containers_syslogd.sh)	7m 24s
build_attest_all (buildconfigs/oak_containers_system_image.sh)	14m 19s
build_attest_all (buildconfigs/oak_containers_nvidia_system_image.sh)	15m 59s
build_attest_all (buildconfigs/oak_echo_enclave_app.sh)	4m 45s
build_attest_all (buildconfigs/oak_echo_raw_enclave_app.sh)	4m 26s
build_attest_all (buildconfigs/oak_functions_enclave_app.sh)	5m 34s
build_attest_all (buildconfigs/oak_functions_insecure_enclave_app.sh)	4m 58s
build_attest_all (buildconfigs/oak_orchestrator.sh)	4m 38s
build_attest_all (buildconfigs/oak_restricted_kernel_simple_io_init_rd_wrapper_bin.sh)	5m 40s
build_attest_all (buildconfigs/stage0_bin.sh)	5m 21s
	2h 10m 19s

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