parted: add missing fnctl include, fix w/musl

[dtzWill]

Disable tests on musl, maybe fix or refine this in the future.

Depends on being able to build sytemd w/musl in order to build/test,
but fixing this is part of upstreaming fixes that make it possible
to test systemd-musl via NixOS tests.

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

---

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: parted

Partial log (click to expand)

these paths will be fetched (0.42 MiB download, 2.08 MiB unpacked):
  /nix/store/ifpnh41rpy7zbbnmph3dzal423pl8ji6-parted-3.2
copying path '/nix/store/ifpnh41rpy7zbbnmph3dzal423pl8ji6-parted-3.2' from 'https://cache.nixos.org'...
/nix/store/ifpnh41rpy7zbbnmph3dzal423pl8ji6-parted-3.2

[GrahamcOfBorg]

No attempt on x86_64-darwin (full log)

The following builds were skipped because they don't evaluate on x86_64-darwin: parted

Partial log (click to expand)

a) For `nixos-rebuild` you can set
  { nixpkgs.config.allowBroken = true; }
in configuration.nix to override this.

b) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
  { allowBroken = true; }
to ~/.config/nixpkgs/config.nix.

[GrahamcOfBorg]

Failure on aarch64-linux (full log)

Attempted: parted

Partial log (click to expand)

[626/1461] Compiling C object 'systemd-rfkill@exe/src_rfkill_rfkill.c.o'.
[627/1461] Compiling C object 'systemd-localed@exe/src_locale_keymap-util.c.o'.
[628/1461] Compiling C object 'bootctl@exe/src_boot_bootctl.c.o'.
[629/1461] Compiling C object 'systemctl@exe/src_systemctl_systemctl.c.o'.
ninja: build stopped: subcommand failed.
builder for '/nix/store/nhsk0sjbx5cn02jprnbydc6ix5sxd1w0-systemd-238.drv' failed with exit code 1
cannot build derivation '/nix/store/fy9jx9fyxil3p6cjnwsh5slvg6ik2qwd-util-linux-2.31.1.drv': 1 dependencies couldn't be built
cannot build derivation '/nix/store/vhw815lccdj83igkvb13m383idkaw30f-lvm2-2.02.177.drv': 2 dependencies couldn't be built
cannot build derivation '/nix/store/0plra9p8d9ihdnly027s6bps005c8pfy-parted-3.2.drv': 2 dependencies couldn't be built
�[31;1merror:�[0m build of '/nix/store/0plra9p8d9ihdnly027s6bps005c8pfy-parted-3.2.drv' failed