Do not save the builds folder when wiping after a job on macOS. Fixes #320.
Do not save the builds folder when wiping after a job on macOS. Fixes #320.

bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration,bazelbuild/continuous-integration