meta-google: nftables-systemd: Parse rules in a useful order

We want to make sure rules get parsed in a sensible order, following a
sorting order similar to systemd units.

Change-Id: Ica06c953dba793d89d50c6b4cfc8e8a2eb1f58de
Signed-off-by: William A. Kennington III <wak@google.com>
diff --git a/meta-google/recipes-google/nftables/files/nftables.service b/meta-google/recipes-google/nftables/files/nftables.service
index 3830988..79f0bb5 100644
--- a/meta-google/recipes-google/nftables/files/nftables.service
+++ b/meta-google/recipes-google/nftables/files/nftables.service
@@ -4,7 +4,7 @@
 [Service]
 Type=oneshot
 RemainAfterExit=yes
-ExecStart=/bin/bash -c 'shopt -s nullglob; echo /etc/nftables/*.rules | xargs -r -n 1 nft -f'
+ExecStart=/usr/libexec/nft-configure.sh
 ExecStop=/bin/bash -c 'nft flush ruleset'
 
 [Install]