For faulting ops, include a comment w/the fault destination

A faulting_op is one that has specified behavior when a fault occurs, generally redirecting control flow to another location.  This change just adds a comment to the assembly output which makes it both human readable, and machine checkable w/o having to parse the FaultMap section.  This is used to split a test file into two parts, so that I can (in a near future commit) easily extend the test file to demonstrate another case.

llvm-svn: 355982