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/nova b/files/rpms/nova
index 0312e85..594393e 100644
--- a/files/rpms/nova
+++ b/files/rpms/nova
@@ -7,7 +7,7 @@
 genisoimage # required for config_drive
 iptables
 iputils
-kernel-modules # dist:f22,f23
+kernel-modules # dist:f22,f23,f24
 kpartx
 kvm # NOPRIME
 libvirt-bin # NOPRIME