More checks

Add some sanity checks

Android-Build-Tools 27.0.3

added print package

Remove broken package check

Merge pull request ruslo#1430 from chfast/pr.ethash

Add ethash package

Boost: Limit maximum number of jobs

Forward HUNTER_CACHE_SERVERS to host

Merge pull request ruslo#1429 from isaachier/opentracing-cpp

Upgrade opentracing-cpp to version 1.4.0

Merge pull request ruslo#1428 from dvirtz/pr.udpate.type_safe

type_safe 0.2