This is a similarity visualization tool that accepts a Module and
passes it to the IRSimilarityIdentifier.  The resulting SimilarityGroups
are output in a JSON file.
Tests are found in test/tools/llvm-sim and check for the file not found,
a bad module, and that the JSON is created correctly.
Reviewers: paquette, jroelofs, MaskRay
Recommit of: 
						
					
				
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