kernel: longterm updates

 - longterm: 3.4 skipped due to iwlwifi
 - longterm: -> 3.10.35
 - longterm: -> 3.12.15
 - stable:   not present in release-13.10

Signed-off-by: Austin Seipp <aseipp@pobox.com>
(cherry picked from commit 19bc051ca11be6abef4bc7ca705a9faa56c356e7)

Conflicts:
	pkgs/os-specific/linux/kernel/linux-3.10.nix
	pkgs/os-specific/linux/kernel/linux-3.12.nix
	pkgs/os-specific/linux/kernel/linux-3.4.nix
	pkgs/os-specific/linux/kernel/linux-3.9.nix