Originally we only print command stdout in verbose build. This leads to misleading debug message when there is error happen in a non-verbose build. This CL prints stdout when the step fails. Change-Id: I8c34ac5576269177ae70fc5e01650193fd252b0b Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/40475 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Gabe Black <gabe.black@gmail.com> Maintainer: Earl Ou <shunhsingou@google.com>