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

[Dmitry Vyukov]

I see.
Does the current version work on freebsd?
What's the purpose of removing libc dependency from there?

crt1 is a part of C runtime. I am interested in complete independence of C world for Go runtime.
But I see that now it's dependent on lib anyway, e.g. there is a call to pthread_self.

http://reviews.llvm.org/D4229