We need to include the `--stamp` flag in `tools/workspace_status.sh` for
the version to be picked up by the linker. Not sure why.
Also changes the VERSION string to STABLE_VERSION, which will cause the
program to be re-linked if the string changes.
Fixes#830
Based on the guidelines at
https://opensource.google.com/docs/releasing/authors/.
1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./'
2. Manual fixup of "Google Inc" references.
3. Add AUTHORS file. Authors may request to be added to this file.
4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS.
Fixes#209
PiperOrigin-RevId: 245823212
Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9