iproute2: add kmod-netlink-diag for ss

Allows proper usage of the ss tool. Otherwise, several errors and bad
data gets thrown:

Cannot open netlink socket: Protocol not supported
Cannot open netlink socket: Protocol not supported
Cannot open netlink socket: Protocol not supported
Cannot open netlink socket: Protocol not supported
Cannot open netlink socket: Protocol not supported
Cannot open netlink socket: Protocol not supported
Cannot open netlink socket: Protocol not supported

Originally reported here: https://github.com/openwrt/packages/issues/8232

Signed-off-by: Rosen Penev <rosenp@gmail.com>

package/network/utils/iproute2/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=iproute2
 PKG_VERSION:=5.5.0
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@KERNEL/linux/utils/net/iproute2
@@ -73,7 +73,7 @@ endef
 define Package/ss
 $(call Package/iproute2/Default)
   TITLE:=Socket statistics utility
-  DEPENDS:=+libnl-tiny +(PACKAGE_devlink||PACKAGE_rdma):libmnl +(PACKAGE_tc||PACKAGE_ip-full):libelf
+  DEPENDS:=+libnl-tiny +(PACKAGE_devlink||PACKAGE_rdma):libmnl +(PACKAGE_tc||PACKAGE_ip-full):libelf +kmod-netlink-diag
 endef
 
 define Package/nstat