[C++ PATCH] clone_function_decl breakup

[Nathan Sidwell]

This patch, from the modules branch, breaks out function cloning from 
the method vector updating.  We have a new function, build_clones, which 
does the building, returning a count of the number of clones (2 or 3). 
clone_function_decl separately adds them to the method vector, if they 
should be added.  I suppose this could have used FOR_EVERY_CLONE, but I 
went with the counting scheme.

On the module branch, build_clones is not static and has a few more 
parameters, but that's a different patch.

installing on trunk.

nathan
-- 
Nathan Sidwell
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