test: don't clean up submounts (v2)

I'm scared, when I see smth like that:
rm: cannot remove ‘/var/lib/jenkins/jobs/CRIU/workspace/test/dump/static/cgroup00/31195/1/.criu.cgyard.6qctPl/systemd/tasks’: Operation not permitted

v2: do that only in the "test" directory

Reported-by: Mr Jenkins
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/Makefile

 TST = $(shell ./zdtm.sh -l)
+RM := rm -f --one-file-system
 
 ZDTM_ARGS ?= -C
 

test/zdtm.sh

@@ -686,7 +686,7 @@ EOF
 
 	cat $test.out
 	cat $test.out | grep -q PASS || return 2
-	[ "$CLEANUP" -ne 0 ] && rm -rf `dirname $ddump`
+	[ "$CLEANUP" -ne 0 ] && rm -rf --one-file-system `dirname $ddump`
 	echo "Test: $test, Result: PASS"
 	return 0
 }
@@ -951,5 +951,5 @@ else
 	fi
 fi
 
-[ -n "$TMP_TREE" ] && rm -rf $TMP_TREE
+[ -n "$TMP_TREE" ] && rm -rf --one-file-system $TMP_TREE
 [ -n "$ZDTM_FAILED" ] && exit 1 || exit 0

test/zdtm/Makefile.inc

@@ -29,4 +29,6 @@ else
 	Q =
 endif
 
-export E Q
+RM := rm -f --one-file-system
+
+export E Q RM