We move from having our own generated version of the googleapis files to
an upstream version that is present in gogo. As part of this, we update
the protobuf package to 1.0 and make some corrections for slight
differences in the generated code.
The impact of this change is very low.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
Because of a side-effect import, we have the possibility of pulling in
several unnecessary packages that are used by the plugin and not at
runtime to implement protobuf structures. Setting these imports to
`weak` prevents this from happening, reducing the total import set,
reducing memory usage and binary size.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
