paml: 4.9c -> 4.9g

Semi-automatic update. 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 4.9g in filename of file in /nix/store/70p59yxnlzhbj8ig1ax8lrrsdbcf37zp-paml-4.9g