Fix Content-Type for Google Cloud Storage API calls #361
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The Google Cloud Storage team rolled out a change today to their service that checks the Content-Type header more strictly against the GS object metadata. Previously, the Buildkite agent would use the Google API library in the normal way, which would allow GS to sniff the content type and fill in the metadata header. But since we also set the Content-Type header when uploading, this unfortunately results in errors like:
The Google Cloud Storage team recommends fixing this by updating to the latest Google API client library and disabling Content-Type auto-sniffing with:
See googleapis/google-api-go-client#134 for background.