Check in generated src code for cos_gpu_installer versions package

Without checking in this generated source code, go modules is broken for
cos/tools.

`go mod tidy` yeilds:
go: finding module for package
cos.googlesource.com/cos/tools.git/src/cmd/cos_gpu_installer/versions
cos.googlesource.com/cos/tools.git/src/cmd/cos_gpu_installer/test tested
by
        cos.googlesource.com/cos/tools.git/src/cmd/cos_gpu_installer/test.test
	imports
	        cos.googlesource.com/cos/tools.git/src/cmd/cos_gpu_installer/versions:
		no matching versions for query "latest"

Change-Id: I26c58d14b4263b20915b4391dea0096f43d8c181
Reviewed-on: https://cos-review.googlesource.com/c/cos/tools/+/36127
Reviewed-by: Robert Kolchmeyer <rkolchmeyer@google.com>
Tested-by: Arnav Kansal <rnv@google.com>
Cloud-Build: GCB Service account <228075978874@cloudbuild.gserviceaccount.com>
3 files changed
tree: 288f1720b572f9c3164f2d3223c2dd5e4217c82e
  1. release/
  2. src/
  3. testing/
  4. .gitignore
  5. BUILD.bazel
  6. cloudbuild.yaml
  7. CONTRIBUTING.md
  8. deps.bzl
  9. go.mod
  10. go.sum
  11. LICENSE
  12. README.md
  13. run_tests.sh
  14. WORKSPACE
README.md

Tools for Container-Optimized OS

This is a repository of various tools developed for Container-Optimized OS. Examples include cos-gpu-installer, cos-toolbox, etc.

See CONTRIBUTING.md for how to contribute.