mesa 18.2.5, introduced in 6b490ee296
changed some private headers, that allegro is relying on. This fix backports
the relevant commit from allegro upstream
cc @7c6f434c
Semi-automatic update generated by https://github.com/ryantm/nix-update tools. These checks were done:
- built on NixOS
- Warning: no binary found that responded to help or version flags. (This warning appears even if the package isn't expected to have binaries.)
- found 5.2.4.0 with grep in /nix/store/ffhc3yjpm6avrds564k83vgn1ppw00yr-allegro-5.2.4.0
- directory tree listing: https://gist.github.com/1045c5013f37df121b7965ce4f5c9f5a
