[omniORB] minimal python rt for SunOS

[Manfred Knemeyer]

Both a SunOS 5.5 and 5.7 executable are on the site but none for 5.6
and omnipython unpacks into the corresponding 5.5 or 5.7 directory.

When configuring for an omniORB 5.6 platform the .mk file says
"You must set a path to a Python 1.5.2 interpreter."
PYTHON =
But specifying, say, the 5.5 directory with this SunOS 5.6 platform
will fail during the omniORB build.  Copying 5.5 omnipython into the
5.6 directory seems to work.