PY3: make sure print stmt is enclosed by '(' & ')'

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from Samba merge request https://gitlab.com/samba-team/samba/merge_requests/68)

lib/wind/gen-combining.py

@@ -42,7 +42,7 @@ import generate
 import UnicodeData
 
 if len(sys.argv) != 3:
-    print "usage: %s UnicodeData.txt out-dir" % sys.argv[0]
+    print("usage: %s UnicodeData.txt out-dir" % sys.argv[0])
     sys.exit(1)
 
 ud = UnicodeData.read(sys.argv[1])