[v7] Use aws s3 cp command to upload linux binaries
[v7] Use aws s3 cp command to upload linux binaries

Preliminary attempt. We want to use the aws s3 cli rather than the s3
concourse resource, because we think that it will be more desireable to
have each version in its own directory in s3.

[#160740878]

Signed-off-by: Mike Kenyon <75e91291951205528b64b1cd362d7f89c6e1e1b5@pivotal.io>

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli