bb-whatdepends: sort the filenames at each level
bb-whatdepends: sort the filenames at each level

Given the current structure, we can't easily sort the *targets* at each level,
so the order is likely unintuitive due to the sort of the recipe path rather
than recipe name, but at least the output is deterministic this way.

Signed-off-by: Christopher Larson <4c8c411260e601995081b113a5ef94a26eff2b25@mentor.com>

rossburton/bb,kergoth/bb,rossburton/bb,kergoth/bb