Rename patchelf.nix to package.nix

Let's just call it by its conventional name, now.

Author: Ericson2314

flake.nix

@@ -66,7 +66,7 @@
             else
               pkgs.stdenv;
         in
-        pkgs.callPackage ./patchelf.nix {
+        pkgs.callPackage ./package.nix {
           inherit version src;
         };