As part of recent decisions regarding namespace naming conventions, all namespaces will be changed to snake case. gem5::Debug became gem5::debug. Change-Id: Ic04606baab3317d2e58ab3ca9b37fc201c406ee8 Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/47305 Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com> Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com> Tested-by: kokoro <noreply+kokoro@google.com>