tzdata: copy leap-seconds.list to $out/share/zoneinfo

Some packages rely on that file for timekeeping, e. g., hare[1].

[1]: https://harelang.org/distributions/

pkgs/data/misc/tzdata/default.nix

@@ -22,7 +22,7 @@ stdenv.mkDerivation rec {
   ];
 
   outputs = [ "out" "bin" "man" "dev" ];
-  propagatedBuildOutputs = [];
+  propagatedBuildOutputs = [ ];
 
   makeFlags = [
     "TOPDIR=$(out)"
@@ -59,6 +59,8 @@ stdenv.mkDerivation rec {
       ( cd $out/share/zoneinfo/posix; ln -s ../* .; rm posix )
       mv $out/share/zoneinfo-leaps $out/share/zoneinfo/right
 
+      cp leap-seconds.list $out/share/zoneinfo
+
       mkdir -p "$dev/include"
       cp tzfile.h "$dev/include/tzfile.h"
     '';