[PATCH] Fix getting environment variables for sanitizers needs on FreeBSD

[Viktor Kutuzov]

> Does the current version work on freebsd?

Yes, though I need to update the patch to handle the case with null 'environ' first. Will do ASAP.

> What's the purpose of removing libc dependency from there?

AFAIU, the less we tied to libc in things like that, the less the need to handle under-initialized sanitizers in intercepted functions.

> crt1 is a part of C runtime. I am interested in complete independence of C world for Go runtime.

We would need a special implementation for Go then, I believe.

http://reviews.llvm.org/D4229