eudev: fix build with a fresh gperf

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

···
   src = fetchurl {
     inherit (s) url sha256;
   };
+  patches = [
+    (fetchurl {
+       # for new gperf
+       url = "https://github.com/gentoo/eudev/commit/5bab4d8de0dcbb8e2e7d4d5125b4aea1652a0d60.patch";
+       sha256 = "097pjmgq243mz3vfxndwmm37prmacgq2f4r4gb47whfkbd6syqcw";
+    })
+  ];
+
   configureFlags = [
     "--localstatedir=/var"
     "--sysconfdir=/etc"