travis/fedora: install the kmod package

This patch fixes the error:

(00.074175) Error (criu/net.c:2638): Locking network failed:
iptables-restore returned -1. This may be connected to disabled
CONFIG_NETFILTER_XT_MARK kernel build config option.
Signed-off-by: Andrei Vagin <avagin@gmail.com>

scripts/build/Dockerfile.fedora.tmpl

@@ -33,7 +33,8 @@ RUN dnf install -y \
 	tar \
 	which \
 	e2fsprogs \
-	asciidoc xmlto
+	asciidoc xmlto \
+	kmod
 
 # Replace coreutils-single with "traditional" coreutils
 # to fix the following error on Fedora 28/rawhide while

scripts/travis/Makefile

@@ -30,7 +30,6 @@ $(TARGETS):
 	docker run --env-file docker.env --rm -it --privileged -v /lib/modules:/lib/modules --tmpfs /run criu-$@ scripts/travis/travis-tests
 
 fedora-asan:
-	ip6tables -L -n
 	echo "$$DOCKER_JSON" > /etc/docker/daemon.json
 	systemctl restart docker
 	$(MAKE) -C ../build $@$(target-suffix)