Update tool/import-mri-files.sh to copy MRI ext/objspace/lib/objspace/trace.rb

Author: andrykonchin

tool/import-mri-files.sh

@@ -48,6 +48,8 @@ cp -R ../ruby/ext/fiddle/lib/fiddle lib/mri
 cp -R ../ruby/ext/fiddle/lib/fiddle.rb lib/mri
 cp ../ruby/ext/nkf/lib/*.rb lib/mri
 cp ../ruby/ext/monitor/lib/*.rb lib/mri
+mkdir lib/mri/objspace
+cp -R ../ruby/ext/objspace/lib/objspace/* lib/mri/objspace
 cp -R ../ruby/ext/openssl/lib/* lib/mri
 cp ../ruby/ext/pty/lib/*.rb lib/mri
 cp ../ruby/ext/psych/lib/psych.rb lib/mri