pkgsMusl.iptables: fix build with upstream patch

Fix is applied upstream but there hasn't been a release yet.

Fixes: 131fce41a3b ("iptables: 1.8.7 -> 1.8.8")

pkgs/os-specific/linux/iptables/default.nix

···
       url = "https://git.netfilter.org/iptables/patch/?id=f319389525b066b7dc6d389c88f16a0df3b8f189";
       sha256 = "sha256-rOxCEWZoI8Ac5fQDp286YHAwvreUAoDVAbomboKrGyM=";
     })
+    # fix Musl build
+    (fetchpatch {
+      url = "https://git.netfilter.org/iptables/patch/?id=0e7cf0ad306cdf95dc3c28d15a254532206a888e";
+      sha256 = "18mnvqfxzd7ifq3zjb4vyifcyadpxdi8iqcj8wsjgw23n49lgrbj";
+    })
   ];
 
   outputs = [ "out" "dev" "man" ];