libowfat: mark as broken

Failing Hydra build: https://hydra.nixos.org/build/156248131

This doesn't build with `glibc-2.34`, however there's already an
upstream fix and can be marked as unbroken as soon as it's available[1].

I tried to apply the patch from a Git mirror[2], however this doesn't
apply properly on `0.32` and I decided to wait for a release - such as
Gentoo does it - instead.

[1] https://bugs.gentoo.org/806505
[2] a10f89d5f3

pkgs/development/libraries/libowfat/default.nix

@@ -17,5 +17,8 @@ stdenv.mkDerivation rec {
     homepage = "https://www.fefe.de/libowfat/";
     license = licenses.gpl2;
     platforms = platforms.linux;
+    # Doesn't build with glibc 2.34: https://hydra.nixos.org/build/156248131
+    # Should be fixed with the next release: https://bugs.gentoo.org/806505
+    broken = true;
   };
 }