Add Ubuntu 20.04 platform, but do not test it in CI yet
This seems like it might be a prerequisite for adding a ubuntu 20.04 platform to bazelci, based on this CI failure:
Closes
@@ -21,6 +21,12 @@ platforms:
build_flags:
- "-c"
- "opt"
+ ubuntu2004:
+ build_targets:
+ - "//src:bazel"
+ build_flags:
+ - "-c"
+ - "opt"
macos:
build_targets:
- "//src:bazel"
