linux: add missing dependencies to kmod-fs-msdos and kmod-fs-xfs

git-svn-id: svn://svn.openwrt.org/openwrt@37398 3c298f89-4303-0410-b956-a3cf2f4a3e73
linux: add missing dependency to kmod-i2c-tiny-usb

git-svn-id: svn://svn.openwrt.org/openwrt@37399 3c298f89-4303-0410-b956-a3cf2f4a3e73
include: modify kernel.mk to build empty kmod packages if the referenced symbols do not exist in the config

git-svn-id: svn://svn.openwrt.org/openwrt@37400 3c298f89-4303-0410-b956-a3cf2f4a3e73
linux: add missing netfilter dependencies

git-svn-id: svn://svn.openwrt.org/openwrt@37401 3c298f89-4303-0410-b956-a3cf2f4a3e73
linux: introduce new kmod-iptunnel for Linux 3.10+, add missing dependencies to netsupport packages

git-svn-id: svn://svn.openwrt.org/openwrt@37402 3c298f89-4303-0410-b956-a3cf2f4a3e73