busybox: add ip command

include/config

 CONFIG_BUSYBOX_CONFIG_SHA512SUM=y
 # CONFIG_BUSYBOX_CONFIG_FEATURE_PREFER_IPV4_ADDRESS is not set
+CONFIG_BUSYBOX_CONFIG_IP=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_IP_ADDRESS=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_IP_LINK=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_IP_ROUTE=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_IP_TUNNEL=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_IP_RULE=y
+CONFIG_BUSYBOX_CONFIG_FEATURE_IP_SHORT_FORMS=y
 
 CONFIG_ATH_USER_REGD=y
 CONFIG_PACKAGE_ATH_DEBUG=y
 
-CONFIG_PACKAGE_luci-lib-core_stripped=y
+CONFIG_PACKAGE_luci-lib-core_srcdiet=y