umockdev-record: Record SELinux context #936

Job	Run time
OS (apt-docker.io/amd64/ubuntu:devel)	1m 51s
OS (apt-docker.io/amd64/ubuntu:latest)	1m 58s
OS (apt-docker.io/amd64/ubuntu:rolling)	1m 44s
OS (apt-docker.io/i386/debian:testing)	1m 47s
OS (apt-docker.io/amd64/debian:testing)	1m 58s
OS (dnf-registry.fedoraproject.org/fedora:latest)	2m 33s
OS (dnf-registry.fedoraproject.org/fedora:rawhide)	2m 30s
OS (alpine-docker.io/alpine)	39s
OS (alpine-docker.io/i386/alpine)	34s
OS ([email protected]/alpine)	27s
OS (nix-docker.io/nixos/nix)	1m 8s
OS (gentoo-)	9m 17s
OS (alpine@gudev-alpine, EXTRA_PACKAGES=libgudev-dev)	31s
	26m 57s

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