lp_solve: 5.5.2.0 -> 5.5.2.5

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/n5jgpvmzaqdfxdfawfi5rf8vav1qgi7w-lp_solve-5.5.2.5/bin/lp_solve -h` got 0 exit code
- ran `/nix/store/n5jgpvmzaqdfxdfawfi5rf8vav1qgi7w-lp_solve-5.5.2.5/bin/lp_solve -h` and found version 5.5.2.5
- found 5.5.2.5 with grep in /nix/store/n5jgpvmzaqdfxdfawfi5rf8vav1qgi7w-lp_solve-5.5.2.5
- found 5.5.2.5 in filename of file in /nix/store/n5jgpvmzaqdfxdfawfi5rf8vav1qgi7w-lp_solve-5.5.2.5

cc "@smironov"