Fix: "Statement seems to have no effect"

Pylint raises an error on the call:

  print

Change it to:

 print()

Change-Id: I507e1b3dd928fa6c32ea7e86260fb3d7b1428e6f

repo

@@ -338,7 +338,7 @@ def SetupGnuPG(quiet):
   if proc.wait() != 0:
     print('fatal: registering repo maintainer keys failed', file=sys.stderr)
     sys.exit(1)
-  print
+  print()
 
   fd = open(os.path.join(home_dot_repo, 'keyring-version'), 'w')
   fd.write('.'.join(map(str, KEYRING_VERSION)) + '\n')