buck: use jdk8

[jonringer]

Motivation for this change

closes #120557

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.

[jonringer]

cc @HolgerPeters

[asbachb]

I wonder if this PR is still needed for the most recent version: facebook/buck#2037

[r-rmcgibbo]

Result of nixpkgs-review pr 120559 at ad521d0 run on aarch64-linux 1

1 package built successfully:

• buck

3 suggestions:

• warning: missing-phase-hooks

  buildPhase should probably contain runHook preBuild and runHook postBuild.

  Near pkgs/development/tools/build-managers/buck/default.nix:22:3:

     |
  22 |   buildPhase = ''
     |   ^
  

• warning: missing-patch-comment

  Please add a comment on the line above, explaining the purpose of this patch.
  Near pkgs/development/tools/build-managers/buck/default.nix:14:15:

     |
  14 |   patches = [ ./pex-mtime.patch ];
     |               ^
  

• warning: missing-phase-hooks

  installPhase should probably contain runHook preInstall and runHook postInstall.

  Near pkgs/development/tools/build-managers/buck/default.nix:31:3:

     |
  31 |   installPhase = ''
     |   ^
  

---

Result of nixpkgs-review pr 120559 at ad521d0 run on x86_64-linux 1

1 package built successfully:

• buck

3 suggestions:

• warning: missing-patch-comment

  Please add a comment on the line above, explaining the purpose of this patch.
  Near pkgs/development/tools/build-managers/buck/default.nix:14:15:

     |
  14 |   patches = [ ./pex-mtime.patch ];
     |               ^
  

• warning: missing-phase-hooks

  installPhase should probably contain runHook preInstall and runHook postInstall.

  Near pkgs/development/tools/build-managers/buck/default.nix:31:3:

     |
  31 |   installPhase = ''
     |   ^
  

• warning: missing-phase-hooks

  buildPhase should probably contain runHook preBuild and runHook postBuild.

  Near pkgs/development/tools/build-managers/buck/default.nix:22:3:

     |
  22 |   buildPhase = ''
     |   ^
  

[jonringer]

I wonder if this PR is still needed for the most recent version: facebook/buck#2037

last stable release was from January, those changes are from feburary.

#120557 (comment)

Until they make a stable release with those changes included, we will just use jdk8