Motivation for this change

(Release notes are not updated yet).

https://helpx.adobe.com/flash-player/release-note/fp_25_air_25_release_notes.html
https://helpx.adobe.com/security/products/flash-player.html

Things done

• Tested using sandboxing
  (nix.useSandbox on NixOS,
  or option build-use-sandbox in nix.conf
  on non-NixOS)

• Built on platform(s)

  • NixOS
  • macOS
  • Linux

• 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/)

• Fits CONTRIBUTING.md.

• Built packages

  • nix-env -i -f . -A pkgs.flashplayer
  • nix-build -I nixpkgs=. -A pkgsi686Linux.flashplayer
  • nix-build -I nixpkgs=. -E "(import <nixpkgs> {}).flashplayer.override { debug = true; }"
  • nix-build -I nixpkgs=. -E "(import <nixpkgs> {}).pkgsi686Linux.flashplayer.override { debug = true; }"
  • nix-build -I nixpkgs=. -A pkgs.flashplayer-standalone
  • nix-build -I nixpkgs=. -A pkgs.flashplayer-standalone-debugger
  • nix-build -I nixpkgs=. -E "(import <nixpkgs> {}).chromium.override { enablePepperFlash = true; }"

• Played a video with Firefox (x86_64)

• Played a video with Chromium (x86_64)

• Checked the version with Firefox (x86_64) http://www.adobe.com/software/flash/about/

• Played a flash animation with sound with flashplayer-standalone and flashplayer-standalone-debugger (x86_64)