mem-ruby: Reset stats in Ruby correctly

Change-Id: Ie60c6f4be7b2a2705dc6da77b8b3d03717f13188
Signed-off-by: Jason Lowe-Power <jason@lowepower.com>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/57269
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bobby Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby Bruce <bbruce@ucdavis.edu>

src/mem/ruby/system/RubySystem.cc

@@ -477,6 +477,7 @@ RubySystem::resetStats()
     for (auto& network : m_networks) {
         network->resetStats();
     }
+    ClockedObject::resetStats();
 }
 
 #ifndef PARTIAL_FUNC_READS