* exp_dist.adb (Specific_Build_General_Calling_Stubs,
	Specific_Build_Stub_Target): New subprograms.
	(Build_Subprogram_Calling_Stubs): Make this procedure independent from
	the PCS implementation used, using the above PCS-customized subprograms.
	Minor reformatting.
	(PolyORB_Support.Helpers): New subunit containing supporting subprograms
	for generation of DSA code targeted to the PolyORB PCS.
	(Add_Stub_Type): Rewrite to isolate the parts that are specific to one
	implementation of the partition communication subsystem in ancillary
	subprograms.
	(Specific_Build_Stub_Type, GARLIC_Support.Build_Stub_Type,
	PolyORB_Support.Build_Stub_Type): New subrograms containing the
	PCS-specific part of Add_Stub_Type.
	(Insert_Partition_Check): Use runtime library function to perform
	E.4(19) check.

        * rtsfind.ads: New entity System.PolyORB_Interface.Make_Ref
        (RE_Same_Partition): New entity, from s-parint.

        * s-parint.ads, s-parint.adb (Same_Partition): New subprogram.

From-SVN: r91884