adding nlmsg_read permission for WFC

Address the following denial:
avc: denied { nlmsg_read } for comm="ip" scontext=u:r:netmgrd:s0
tcontext=u:r:netmgrd:s0 tclass=netlink_xfrm_socket permissive=0

Bug:23326242
Change-Id: Ib7460a74245c6a06a85743d80a2e76a3c3cd2338
diff --git a/sepolicy/netmgrd.te b/sepolicy/netmgrd.te
old mode 100644
new mode 100755
index 0fb2cbb..6b89df4
--- a/sepolicy/netmgrd.te
+++ b/sepolicy/netmgrd.te
@@ -13,7 +13,7 @@
 
 allow netmgrd self:netlink_socket create_socket_perms;
 allow netmgrd self:netlink_route_socket nlmsg_write;
-allow netmgrd self:netlink_xfrm_socket { create_socket_perms nlmsg_write };
+allow netmgrd self:netlink_xfrm_socket { create_socket_perms nlmsg_write nlmsg_read};
 allow netmgrd self:socket create_socket_perms;
 allow netmgrd netd_socket:sock_file w_file_perms;
 allow netmgrd net_data_file:dir r_dir_perms;