Add OpenCL benchmarks to Collective Mind Node to crowdsource autotuning

[gfursin]

At some points extend Collective Mind Node (https://play.google.com/store/apps/details?id=com.collective_mind.node) to support OpenCL benchmarks such as SLAMbench and HOG. CMN is used to crowdsource benchmarking, autotuning and predictive analytics.

Moved from CK: mlcommons/ck#43