Create modules.conf in build workflow

policy/modules.conf was droped and needs to be generated during build.

.github/workflows/build.yml

@@ -11,6 +11,7 @@ jobs:
       - run: dnf install --nogpgcheck -y git-core checkpolicy policycoreutils-devel make m4 findutils
       - run: git clone --depth=1 https://github.com/containers/container-selinux.git /tmp/container-selinux
       - run: cp /tmp/container-selinux/container.* policy/modules/contrib
+      - run: make -j $(nproc) conf
       - run: make -j $(nproc) policy
       - run: make -j $(nproc) validate
       - run: make -j $(nproc) container.pp