This patch updates the gcn3 Dockerfile to use the version of rocm-cmake that MIOpen specifies in its dev-requirements.txt. This fixes a build conflict with newer versions of rocm-cmake that require a higher version of SCons than we have in the Dockerfile. Change-Id: I70887fd91807b77e5015037830cfe96560ac8a31 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/37155 Maintainer: Gabe Black <gabe.black@gmail.com> Maintainer: Matt Sinclair <mattdsinclair@gmail.com> Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>