This enables go build tags so the GCS and OSS driver support is
available in the binary distributed via the image build by Dockerfile.
This led to quite a few fixes in the GCS and OSS packages raised as
warning by golang-ci linter.
Signed-off-by: Milos Gajdos <milosthegajdos@gmail.com>
(cherry picked from commit 6b388b1ba6)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
