[PATCH] Fix llvm::sys::path::home_directory on unix to get path from passwd.pw_dir when the $HOME variable isn't set

[Mehdi AMINI]

A few comments:

- Use clang-format or manually follow the rules defined here: http://llvm.org/docs/CodingStandards.html
- You are using a VLA, this is not C++ standard I believe.
- At least add a clear comment on what you are doing and why (explain why getenv("HOME") might fail.

Thanks.


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http://reviews.llvm.org/D7515

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