[omniORB] dylib compatibility version missing on macOS

[Benjamin Bertrand]

>> I applied that patch on 4.3.2 and compiled. It looks good for all
>> libraries except libomnithread:

> Sorry about that — I missed a couple of files from the check-in.

> For historical reasons, omnithread is different, in that it only has a
> two element version number, not three. I added a special case for it in
> its dir.mk file, but that was missed from the check-in.

> I've added it now.

No problem. It looks good now.
Thanks for the fix!

Benjamin