Update commit status to add link to logs

[hasnat]

using something like
https://developer.github.com/v3/repos/statuses/#create-a-status

curl "https://api.github.com/repos/hasnat/trigger-sonar-scanner/statuses/xxxxxxxCOMMITxxxxxxx?access_token=xxxxxACCESS_TOKENxxxxx"   -H "Content-Type: application/json"   -X POST   -d "{\"state\": \"success\", \"context\":\"sonarqube\", \"description\": \"SonarQube reported no issues\", \"target_url\": \"http://www.example.com\"}"