travis: build tests in docker containers

travis-ci: success for series starting with [1/3] zdtm: call test_init() before doing anything
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

scripts/build/Dockerfile.tmpl

@@ -25,3 +25,4 @@ RUN make -j $(nproc) CC=$CC criu/parasite-syscall.o
 RUN make -j $(nproc) CC=$CC
 RUN make mrproper
 RUN bash -c 'CLEAN="$(git clean -ndx --exclude=scripts/build --exclude=.config)"; echo "${CLEAN}"; test -z "${CLEAN}"; exit $?'
+RUN make -j $(nproc) CC=$CC -C test/zdtm

test/zdtm/static/autofs.c

@@ -227,7 +227,7 @@ static int check_fd(struct autofs_params *p)
 	}
 	if (st.st_blksize != p->fd_stat.st_blksize) {
 		pr_err("%s: st_blksize differs %ld != %ld:\n", p->mountpoint,
-				st.st_blksize, p->fd_stat.st_blksize);
+				(long)st.st_blksize, (long)p->fd_stat.st_blksize);
 		ret++;
 	}
 	if (st.st_blocks != p->fd_stat.st_blocks) {