gemini: switch to kernel 3.10

gemini: switch to kernel 3.10

This switches to kernel 3.10 that was prepared by Hauke in r41531 :
    gemini: add support for kernel 3.10

    This is compile tested only, please run test and report back.

I've simply checked if it still compiles, unfortunately we didn't get
any feedback for this target.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@42450 3c298f89-4303-0410-b956-a3cf2f4a3e73