omniorb: 4.2.0 -> 4.2.2

Semi-automatic update. These checks were performed:

- built on NixOS
- ran `/nix/store/h94k1a3vvna29as5663ch6vffml5p07w-omniorb-4.2.2/bin/omniidl -h` got 0 exit code
- ran `/nix/store/h94k1a3vvna29as5663ch6vffml5p07w-omniorb-4.2.2/bin/omkdepend -h` got 0 exit code
- ran `/nix/store/h94k1a3vvna29as5663ch6vffml5p07w-omniorb-4.2.2/bin/omkdepend --help` got 0 exit code
- ran `/nix/store/h94k1a3vvna29as5663ch6vffml5p07w-omniorb-4.2.2/bin/omniNames --help` got 0 exit code
- found 4.2.2 with grep in /nix/store/h94k1a3vvna29as5663ch6vffml5p07w-omniorb-4.2.2
- found 4.2.2 in filename of file in /nix/store/h94k1a3vvna29as5663ch6vffml5p07w-omniorb-4.2.2

cc "@smironov"