lib Fuzzer / FreeBSD basic support following-up

Hi dear FreeBSD users.

So since the last time my work to integrate FreeBSD into lib fuzzer supported oses had been merged last week (for x86 / x86_64 archs).

https://reviews.llvm.org/rCRT322380

The clang frontend counterpart is on the verge to be merged as well.

https://reviews.llvm.org/D41809

So whenever you wish, you can try out making this feature.

Regards.