version.sh check for presence of processor before setting CORES to the number of instances

As Some single core arm devices do not have that listed..

cat /proc/cpuinfo
Processor: ARMv7 Processor rev 5 (v7l)
BogoMIPS: 789.70
Features: swp half thumb fastmult vfp edsp iwmmxt thumbee vfpv3 vfpv3d16 tls
CPU implementer: 0x56
CPU architecture: 7
CPU variant: 0x0
CPU part: 0x581
CPU revision: 5

Hardware: SolidRun Cubox
Revision: 0000
Serial: 0000000000000000

Reported-by: Armde <armde@elektromaniak.wz.cz>
Signed-off-by: Robert Nelson <robertcnelson@gmail.com>