mem-ruby: fix whitespacing errors in RubySystem

These errors cause other commits to fail pre-commit

Change-Id: I379d2d7c73f88d0bb35de5aaa7d8cb70a83ee1dd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/69397
Tested-by: kokoro <noreply+kokoro@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
1 file changed