Correctly handle directories with child `AdditionalPath` or `RenamePath` elements

[ralish]

Assume we're installing a component which contains at least one AdditionalPath or RenamePath element for a file inside a folder (i.e. not at the root of the component directory). If the destination directory does not exist we'll preference creating a directory symlink instead of a directory with individual file symlinks. However, in this scenario the AdditionalPath and RenamePath elements for files within this directory are not respected.