Consolidate debug flags which are defined separately in multiple ISAs in arch/SConscript instead. This will prevent conflicts when more than one ISA can be compiled at a time. Change-Id: I70862c403d19f04bbcbabd74dd751ca92d1ed942 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/50334 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com> Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>