The test gated on a pjdfstest binary in PATH but then proved a suite it
cloned itself, so a tree installed by make setup-pjdfstest was never found.
Look for the built suite under external_tools first, then clone into the
work dir as before.
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
The suite staged cloned tools and generated scripts under a predictable
/tmp path another user could pre-create and swap mid-run.
Generated with [Devin](https://devin.ai)
Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Chris Lu