coreutils: use --no-as-needed to keep libposix

overlay/default.nix

@@ -48,6 +48,8 @@ in {
         "--disable-libcap"
         "--disable-nls"
       ];
+      LDFLAGS = [ "-Wl,--no-as-needed" ];
+      # keep libposix NEEDED
     })
   else
     coreutils;