libsmbios: Fix build

[Artturin]

Since 5093766 TMPDIR is needed in fixupPhase

RUNPATH before

$ , objdump -x ./result/bin/smbios-sys-info-lite | grep RUNPATH
  RUNPATH              /nix/store/hn044f8g9b2dfynljlm3nsr32g3pwqr1-libsmbios-2.4.3/lib:/nix/store/1x4ijm9r1a88qk7zcmbbfza324gx1aac-glibc-2.37-8/lib

RUNPATH after

$ , objdump -x ./result/bin/smbios-sys-info-lite | grep RUNPATH
  RUNPATH              /nix/store/l3ayxdl45xs6fam6b8n0j0fs34hj7gdq-libsmbios-2.4.3/lib:/nix/store/1x4ijm9r1a88qk7zcmbbfza324gx1aac-glibc-2.37-8/lib

Description of changes

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• 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/)
• 23.11 Release Notes (or backporting 23.05 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.

[Artturin]

Making it more future proof #246293