[PATCH] [DWARF] Fix a bug in line info handling

[Keno Fischer]

Yes, I tried, just using `address - 1` for the second patch and it passes the testcase, so I'm happy. I don't know enough about this code to decide which is better, so just let me know and I'll update the code accordingly.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9925

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