vndk-def: Add VNDK_VER to update_dataset.py

This commit adds VNDK_VER to the file generated by update_dataset.py
and make sure the relative paths are preserved.

Test: Run ./tools/update_dataset.py and compare with
datasets/eligible-list-*.csv.
Change-Id: Ie0407f6558b4eb08d8deff299c51532fd65edd85
1 file changed