New comment by Piraty on void-packages repository

https://github.com/void-linux/void-packages/pull/18804#issuecomment-597072762

Comment:
~is this still WIP?~ yes, musl fails with
```
/builddir/opentoonz-1.4.0/toonz/sources/stdfx/igs_resource_msg_from_err_unix.cpp:313:35: error: invalid conversion from 'int' to 'const char*' [-fpermissive]

  313 |     const char *ret = ::strerror_r(erno, buff, sizeof(buff));

      |                       ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

      |                                   |

      |                                   int
```