Square and HeteroSync's pre-built binaries were downloaded into the tests folder in the nightly regression script, but the docker command running them assumed we were in GEM5_ROOT. This commit fixes this problem by specificying the benchmark root for the applications. Change-Id: I905c8bde7231bc708db01bff196fd85d99c7ceac Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/51247 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>