fix log file uploads now getting a 500 - add content-length header
fix log file uploads now getting a 500 - add content-length header

Microsoft/vso-agent,dragongame/vso-agent,AlexRukhlin/vso-agent,Microsoft/vso-agent,ankitgo/vso-agent,TwoToneBytes/vso-agent,AlexRukhlin/vso-agent,Microsoft/vso-agent,AlexRukhlin/vso-agent,DanielBMann9000/vso-agent,Microsoft/vso-agent,ankitgo/vso-agent,Microsoft/vso-agent,DanielBMann9000/vso-agent,TwoToneBytes/vso-agent,Microsoft/vso-agent,AlexRukhlin/vso-agent,TwoToneBytes/vso-agent,dragongame/vso-agent,DanielBMann9000/vso-agent,ankitgo/vso-agent,dragongame/vso-agent,AlexRukhlin/vso-agent,ankitgo/vso-agent,DanielBMann9000/vso-agent,dragongame/vso-agent,ankitgo/vso-agent,TwoToneBytes/vso-agent,TwoToneBytes/vso-agent,dragongame/vso-agent,DanielBMann9000/vso-agent