Different `strerror_r` function usage about toml11

[Esonhugh]

Havoc depends on [toml @ c32a20e](https://github.com/ToruNiina/toml11/tree/c32a20e1ee690d6e6bf6f37e6d603402d49b15f0)

[Esonhugh]

I guess if change the order of (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L) || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 600) and defined(_GNU_SOURCE) may fix this problem.

[ToruNiina]

Thank you for finding the problem.
If the patch fixes the problem in your env (and also passes all other CIs), it is worth merging.
Would you be interested in creating a pull request to address this issue?

[Esonhugh]

Thank you for finding the problem. If the patch fixes the problem in your env (and also passes all other CIs), it is worth merging. Would you be interested in creating a pull request to address this issue?

HELP NEEDED

I think this is a problem based on difference between arch and compilers. And that will be a little bit hard on testing whether fix works.

So I need more details about such Marco and flags. And then create a new fix in PR. What do u think about that?

[Esonhugh]

Bad news is it works well when i clone project directly(not as submodule). It compiled and works well.
and I tried change order of defined and it died in Havoc as well.

[Esonhugh]

#233

[ToruNiina]

Fixed by #233.