Add detection for CPU model 69 (Haswell ix-4xxxU)

i5-4200U and i7-4500U (and possibly more) are model 69, which
previously was not detected properly, which triggered a fallback
to optimisations core 2 which apparently fails to compile due to
conflicting definitions of intrinsics.
Merge pull request #1 from CounterPillow/cpudetect-fix

Add detection for CPU model 69 (Haswell ix-4xxxU)