linux-yocto/3.17: update to v3.17.8

Updating to the latest korg stable version.

(From OE-Core rev: 4d342c25)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

Conflicts:
	meta/recipes-kernel/linux/linux-yocto-tiny_3.17.bb
	meta/recipes-kernel/linux/linux-yocto_3.17.bb
	remove arm64, not supported in dizzy.