platin: write cache-hits into report file

Author: stefanhepp

tools/platin/lib/tools/wcet.rb

@@ -344,6 +344,7 @@ def summarize_results(additional_info = {})
         'source' => te.origin,
         'cycles' => te.cycles }
       te.attributes.select { |k,v| k.start_with? 'cache-misses' }.each { |k,v| dict[k] = v }
+      te.attributes.select { |k,v| k.start_with? 'cache-hits' }.each { |k,v| dict[k] = v }
       te.attributes.select { |k,v| k.start_with? 'cache-cycles' }.each { |k,v| dict[k] = v }
       (additional_info[te.origin] || []).each { |k,v| dict[k] = v }
       dict