[21.05] pinball: fix

[hrhino]

There was an override of autoconfHook to use automake 1.15.x; I'm not
sure what changed since this package was added but it explicitly needs
1.16.1 or greater for the submodule libltdl.

Anyhow, just remove the override.

(cherry picked from commit 3e4aeea) from PR#124441

Motivation for this change

Backport of #124441

ZHF: #122042

@jonringer

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Added a release notes entry if the change is major or breaking
• Fits CONTRIBUTING.md.

[jonringer]

LGTM

Result of nixpkgs-review pr 124493 run on x86_64-linux 1

1 package built:

• pinball