The nightly tests failed: https://www.mail-archive.com/gem5-dev@gem5.org/msg40828.html This failure was due to new GPU tests assuming tests were executed from the `tests` directory. They are actually executed from the gem5 root. This patch fixes the error. Change-Id: Ie5f86ef4eb13134a2a3d0291422f65c9ee355a92 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/51607 Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu> Maintainer: Matt Sinclair <mattdsinclair@gmail.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>