chromium: Fix the build (libva redefinition)

[primeos]

The recent libva 2.11.0 update (780fa55) broke the chromium and
ungoogled-chromium builds. Fix #118931.

---

Actual source: kiss-community/community#252

• archlinux/svntogit-packages@199ffbc#diff-37538beb61ff63edebbf735dfcf39e5d732f49183d6beb097169d971875ca422R94
• chromium: build fail multiple definition of 'enum _VA_TEE_EXEC_FUNCTION_ID' kiss-community/community#246

Motivation for this change

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/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

[primeos]

Note: This is still untested. On my test setup it'll take 10-12h to test so help is welcome. There are also other options, see #118931.

[flokli]

I just kicked off a build, will report back.

[sternenseemann]

I just kicked off a build, will report back.

Reporting back for @flokli, the build has apparently finished successfully:

$ nix-store --realise /nix/store/27m0db53d2sq1pn4fs3d23fclb7c87hd-chromium-89.0.4389.114.drv
warning: you did not specify '--add-root'; the result might be removed by the garbage collector
/nix/store/9gfcmn7pqwdhjwcl6jilkmwm7iw8yd28-chromium-89.0.4389.114-sandbox
/nix/store/mmrzrwnn7974px169c2kw7jryphsmmri-chromium-89.0.4389.114

[primeos]

Great, thanks a lot to both of you! Let's merge this then :)

[mweinelt]

/nix/store/6kxlap6bkhhzgzx42f3flfqbx6n08bz8-vm-test-run-chromium-stable