libliftoff: fix override mechanism by using callPackage

Before the change this override had no effect:

    $ nix build --impure --expr 'with import ./. {}; libliftoff_0_4.override { stdenv = gcc14Stdenv; }'

After the change it applies new `gcc` and exposes the failure.

Author: trofi

pkgs/top-level/all-packages.nix

@@ -22196,7 +22196,7 @@ with pkgs;
 
   liblc3 = callPackage ../development/libraries/liblc3 { };
 
-  inherit (callPackages ../development/libraries/libliftoff { }) libliftoff_0_4 libliftoff_0_5;
+  inherit (callPackage ../development/libraries/libliftoff { }) libliftoff_0_4 libliftoff_0_5;
   libliftoff = libliftoff_0_5;
 
   liblqr1 = callPackage ../development/libraries/liblqr-1 {