add sepolicydev image for building SELinux modules

sepolicydev/Dockerfile

+FROM quay.io/centos/centos:stream
+
+LABEL \
+	org.opencontainers.image.title="sepolicydev" \
+	org.opencontainers.image.url="https://code.fbi.h-da.de/hdacloud/images" \
+	org.opencontainers.image.source="https://code.fbi.h-da.de/hdacloud/images"
+
+
+RUN yum distro-sync -y \
+	&& yum install -y selinux-policy-devel \
+	&& yum clean all
+
+WORKDIR /work