rusoto: Add support for S3 HLS sink
This is a helper bin allowing the output of HLS sink to be uploaded to S3.
The attached sample code can be used to test this. hls-s3-bridge.py
GST_PLUGIN_PATH=target/debug S3_REGION=region-name S3_BUCKET=bucket-name S3_KEY=key-name ./hls-s3-bridge.py