oniro-sysctl: add sysctl kernel setting

Add option to not send ICMP redirects messages.

Signed-off-by: Davide Gardenal <davide.gardenal@huawei.com>

meta-oniro-core/recipes-core/oniro-sysctl/oniro-sysctl/oniro-net-ipv4.conf

@@ -9,6 +9,9 @@ net.ipv4.conf.all.rp_filter = 1
 # Do not accept ICMP redirect messages
 net.ipv4.conf.default.accept_redirects = 0
 
+# Do not send ICMP redirect messages
+net.ipv4.conf.all.send_redirects = 0
+
 # Do not accept packets with SRR option.
 net.ipv4.conf.default.accept_source_route = 0