package/coremark: new package

CoreMark is a simple, yet sophisticated benchmark that is designed
specifically to test the functionality of a processor core. Running
CoreMark produces a single-number score allowing users to make quick
comparisons between processors.

https://www.eembc.org/coremark/



Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com>
Tested-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>