kernel: update linux 3.8 to 3.8.6

include/kernel-version.mk

target/linux/adm5120/Makefile

target/linux/ar71xx/Makefile

...linux/ar71xx/patches-3.8/902-unaligned_access_hacks.patch

target/linux/atheros/Makefile

target/linux/avr32/Makefile

...rcm47xx/patches-3.8/700-ssb-gigabit-ethernet-driver.patch

target/linux/cns21xx/Makefile

...ux/cns21xx/patches-3.8/104-cns21xx-usb-ehci-support.patch

target/linux/cns3xxx/Makefile

...linux/cns3xxx/patches-3.8/010-move_virtual_io_space.patch

target/linux/cns3xxx/patches-3.8/015-clkdev_support.patch

target/linux/ep93xx/Makefile

target/linux/generic/patches-3.8/060-hso_devices.patch

target/linux/generic/patches-3.8/100-overlayfs.patch

...et/linux/generic/patches-3.8/102-ehci_hcd_ignore_oc.patch

...ux/generic/patches-3.8/450-mtd_plat_nand_chip_fixup.patch

...neric/patches-3.8/643-bridge_remove_ipv6_dependency.patch

target/linux/generic/patches-3.8/655-increase_skb_pad.patch

target/linux/generic/patches-3.8/721-phy_packets.patch