Get slate kernel compiling with danny linux-yocto

Solve a couple of build issues as prerequisite to working on
accelerometer support:

* git branch standard/default/common-pc/sugarbay was not found, and
  overriding KBRANCH is apparently not needed as halfhalo uses standard

* rock.scc used features no longer in linux-yocto-3.4 as of danny
  features/hpet/hpet.scc
  features/logbuf/size-normal.scc
Compile with CONFIG_SENSORS_LSM303DLH_INPUT_DEVICE

Resulting kernel not tested yet on the target, but at least it compiles now,
after updating the path of a header file from 2.6 to 3.4 location.
Merge remote-tracking branch 'origin/wormo/accelerometer' into halfhalo/refactor

Conflicts:
	meta-slate/recipes-kernel/linux/files/slate.cfg
	meta-slate/recipes-kernel/linux/linux-yocto_3.4.bbappend
Fix rock build