Add Continuous Integration using Github actions, re-using similar setup
from linux-nfc/neard [1] (dropped Alpine, Ubuntu i386, sanitizers and
few others action steps). Since I copied most files, I retained all
original copyrights.
The CI will build cdba for several different distros and architectures.
[1] https://github.com/linux-nfc/neard
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
