firefox-bin: 60.0.1 -> 60.0.2 critical security update

[tokudan]

Motivation for this change

The regular firefox update seems stuck on some other updates. Critical security updates shouldn't sit around too long, so I try to at least update firefox-bin.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• 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 nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

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[tokudan]

Security advisory: https://www.mozilla.org/en-US/security/advisories/mfsa2018-14/

[adisbladis]

Thank you!