Make rust rules use workspace root as-is if it's in the correct form (#27)
Make rust rules use workspace root as-is if it's in the correct form (#27)

I'm working on updating the execution root structure (see https://github.com/bazelbuild/bazel/issues/1681), which makes manually building the prefix unnecessary. I've left the strip_prefix("external/" code for backwards compatibility,
but it should be able to be removed in the future.
bazelbuild/rules_rust,bazelbuild/rules_rust,bazelbuild/rules_rust,bazelbuild/rules_rust,bazelbuild/rules_rust