perl-cross: 1.1.8 -> 1.2, needed for newer perl versions

[dtzWill]

1.1.8 does not support the versions of perl in-tree.

As a result cross-compiling fails at perl which
blocks quite a few things :).

• 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/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Fits CONTRIBUTING.md.

---

Mostly tested that this builds, with bias towards musl platforms O:).

Things like:

• $ nix build -f . pkgsCross.musl64.perl -o perl-cross-musl64
• $ nix build -f . pkgsCross.aarch64-multiplatform-musl.perl -o perl-cross-aarch64

cc @shlevy in case there's anything in particular that should be tested...?

[shlevy]

LGTM

[GrahamcOfBorg]

Success on x86_64-darwin (full log)

Attempted: perl

Partial log (click to expand)

/nix/store/66103yn34knil01sz58z2fk4p2ly8dw3-perl-5.24.4

[GrahamcOfBorg]

Success on aarch64-linux (full log)

Attempted: perl

Partial log (click to expand)

/nix/store/pngyllkbhkjvbkmwg1k6nhf1mx9775w6-perl-5.24.4

[GrahamcOfBorg]

Success on x86_64-linux (full log)

Attempted: perl

Partial log (click to expand)

/nix/store/7dn8rrvjmigv13wgzlmgdg2l4m6q6bwx-perl-5.24.4