[RFA] Revised C++ ABI abstraction patches

[Andrew Cagney]

Jim,

When Dan originally submitted his original patch it was large. 
Fortunatly it was only (mostly) the mechanical change of separating out
the C++ stuff (it was also approved so I don't know why it wasn't
committed).  Now, however, the patch has managed to accumulate much much
more (sigh).  This really should be broken down into the mechanical
change of creating a new file and the modifications that fix real bugs.

	enjoy,
		Andrew