bazelbuild
fix: use appropriate entry type for runfiles that are directories
This fixes a regression at some point from 0.9.1 to 0.10.1, which caused pkg_tar to fail when include_runfiles was true and some of the sources had data dependencies that were directories.
The code that handles the include_runfiles attribute was always assigning ENTRY_IS_FILE as entry type of runfiles. This caused an error in the python code when packaging, as it encountered a directory in an unexpected place.
The fix is just considering ENTRY_IS_TREE types, in the same way as it is done in _process_pkg_files.
As a side note: While this is better, it does not fully solve the problem. When the directory is linked, then is_directory will be false since links are files.
