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Fix Linux compilation issue of ProfilingATNSimulator #4601

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Fix Linux compilation issue of ProfilingATNSimulator #4601

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WillDignazio
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  • NSEC_PER_SEC is available via CDispatch bindings, which are not currently imported
  • Importing them would be heavy handed compared to replacing with the constant (and leaving a comment)

Compiling on Linux currently produces:

         [239/269] Compiling Antlr4 SetTransition.swift
         /workspace/.build/checkouts/antlr4/runtime/Swift/Sources/Antlr4/atn/ProfilingATNSimulator.swift:63:85: error: cannot find 'NSEC_PER_SEC' in scope
         decisions[decision].timeInPrediction += Int64((stop - start) * TimeInterval(NSEC_PER_SEC))

After fixing this, it compiles (and behaves) as expected.

@WillDignazio
Fix Linux compilation issue of ProfilingATNSimulator
06cbc22 
* NSEC_PER_SEC is available via CDispatch bindings, which are not currently imported
* Importing them would be heavy handed compared to replacing with the constant (and leaving a comment)

Signed-off-by: Will Ziener-Dignazio <wzienerdignazio@apple.com>
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@WillDignazio