linux-yocto-custom: Update to more recent commit, add RTC patches

Update the linux-yocto-custom_3.10.0 recipe to point to a more
recent commit to pick up some Atmel patches.  Add two patches for
commits that correct an issue with locking up access to the RTC.
The two patches will be added to the Atmel Linux repository in
the near future.

Signed-off-by: Bryan Evenson <bevenson@melinkcorp.com>