kernel: update linux 3.7 to 3.7.3

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt@35216 3c298f89-4303-0410-b956-a3cf2f4a3e73
all targets: use numerically prefixed uci-defaults file names to better control order of execution

git-svn-id: svn://svn.openwrt.org/openwrt@35217 3c298f89-4303-0410-b956-a3cf2f4a3e73
base-files: use numerically prefixed uci-defaults names

git-svn-id: svn://svn.openwrt.org/openwrt@35218 3c298f89-4303-0410-b956-a3cf2f4a3e73
ipv6-support: adapt UCI defaults to new ordering

git-svn-id: svn://svn.openwrt.org/openwrt@35219 3c298f89-4303-0410-b956-a3cf2f4a3e73