kmod-ipsec: fix a compile error with some configurations. since CONFIG_XFRM_IPCOMP is not selectable on its own (no prompt), always select CONFIG_INET_IPCOMP along with it, to make sure that it gets enabled

SVN-Revision: 22402

package/kernel/modules/netsupport.mk

@@ -181,6 +181,7 @@ define KernelPackage/ipsec
   KCONFIG:= \
 	CONFIG_NET_KEY \
 	CONFIG_XFRM_USER \
+	CONFIG_INET_IPCOMP \
 	CONFIG_XFRM_IPCOMP
   FILES:=$(foreach mod,$(IPSEC-m),$(LINUX_DIR)/net/$(mod).ko)
   AUTOLOAD:=$(call AutoLoad,30,$(notdir $(IPSEC-m)))