improve caching of mtda isar layer #301
Merged
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The layerdir variable contains an absolute path that is immediately expanded and points into the build host. This breaks sstate caching for tasks that reference this variable when building from a different path (like in the gitlab-ci). To fix this, we simply set the vardepvalue to a fixed value. As this variable just points to the current layer, there are no logical external changes expected and by that, this "pinning" is fine.