Allow to use Fedora 24 with devstack

Looks like f24 does not have any special change compared to the
previous release, we just need to add f24 where f23 present.

Change-Id: Ia4a58de4973ef228735c48b33453a0562dc65258
diff --git a/files/rpms/swift b/files/rpms/swift
index 46dc59d..1e05167 100644
--- a/files/rpms/swift
+++ b/files/rpms/swift
@@ -2,7 +2,7 @@
 liberasurecode-devel
 memcached
 pyxattr
-rsync-daemon # dist:f22,f23
+rsync-daemon # dist:f22,f23,f24
 sqlite
 xfsprogs
 xinetd