When running GTA, the type `path` was set to `rpath`. This equates to the package path (`github.com/traefik/yaegi`) in most cases. In the vendored case the `rpath` is the sub package path `something/vendor/github.com/traefik/yaegi` causing issues in typecheck and likely further down the line. By using the `importPath` it makes this consistent.
**Note:** I have no clue how to test this decently. I am open to options here.
Potentially Fixes#916
83676577ac