[15] RFR(XS): 8241595: Fix missing debug_orig information in Ideal Graph Visualizer

[Christian Hagedorn]

Hi

Please review the following small enhancement:
https://bugs.openjdk.java.net/browse/JDK-8241595
http://cr.openjdk.java.net/~chagedorn/8241595/webrev.00/

The debug_orig information is never printed for the Ideal Graph 
Visualizer since temp_set->test_set() is checked wrongly. This fix 
reuses the dump_orig() method to print and show the same information in 
the Ideal Graph Visualizer as when dumping a node on the command line.

Thank you!

Best regards,
Christian