Allow system_server to bind ping sockets.

This allows NetworkDiagnostics to send ping packets from specific
source addresses in order to detect reachability problems on the
reverse path.

This addresses the following denial:

[  209.744636] type=1400 audit(1441805730.510:14): avc: denied { node_bind } for pid=8347 comm="Thread-202" saddr=2400:xxxx:xxxx:xxxx:40b1:7e:a1d7:b3ae scontext=u:r:system_server:s0 tcontext=u:object_r:node:s0 tclass=rawip_socket permissive=0

Bug: 23661687

(cherry picked from commit c37121436be95ae2ed75cb83605940455446ef4e)

Change-Id: Ia93c14bc7fec17e2622e1b48bfbf591029d84be2
1 file changed