python3: Use `range()` function from six.moves

Signed-off-by: Lumir Balhar <lbalhar@redhat.com>
Signed-off-by: Jiri Kastner <jkastner@redhat.com>

procfs/utilist.py

diff --git a/procfs/utilist.py b/procfs/utilist.py
index 0e7c24f..13f40fa 100755
--- a/procfs/utilist.py
+++ b/procfs/utilist.py
@@ -18,6 +18,9 @@
 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 #
 
+from six.moves import range
+
+
 def hexbitmask(l, nr_entries):
 	hexbitmask = []
 	bit = 0