avoid relative shlex import

fixes #12777

lib/ansible/utils/cmd_functions.py

@@ -14,6 +14,7 @@
 #
 # You should have received a copy of the GNU General Public License
 # along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+from __future__ import absolute_import
 
 import os
 import sys