update x86 generic to kernel v3.7

Signed-off-by: Russell Senior <russell@personaltelco.net>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@35616 3c298f89-4303-0410-b956-a3cf2f4a3e73