pcre2: backport jit auto-detection

[trofi]

Without the change pcre2 build without jit support. This happens because --wit-jit=auto was broken in this release. THe change backports upstream fix.

Before the change ./configure log:

pcre2>     Enable JIT compiling support ....... : no

After the change:

pcre2>     Enable JIT compiling support ....... : yes

I initially observed the failures on rizin as a spam of failures to JIT a trivial regex:

$ rizin
ERROR: Regex compilation for '\s+' failed at 0: bad JIT option
ERROR: Regex compilation for '\s+' failed at 0: bad JIT option
...
ERROR: Regex compilation for '\s+' failed at 0: bad JIT option
 -- Check your IO plugins with 'rizin -L'
[0x00000000]>

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 24.05 Release Notes (or backporting 23.05 and 23.11 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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