tools: Add patchwork_post.py
Add a script that allow posting testing results to Patchwork.
A clean re-write with support for posting results for patches too!
The tool defaults to FDO's Patchwork instance, but that bit is left configurable too.
Example invocations:
./patchwork_post.py -s success -n Fi.CI.BAT series 1234 1
./generate_results | ./patchwork_post.py -s warning -n Fi.CI.IGT -f - patch 3456