[PATCH 05/12] Refactor math/bits/math-finite.h, reusing math/bits/mathcalls.h [BZ #23292]

[Joseph Myers]

I don't see anything in this patch to ensure that the redirections now 
done through bits/mathcalls.h don't apply on ia64, as that doesn't have 
__*_finite (e.g. a new bits/ header defining a macro for whether _finite 
redirects are supported, for which ia64 provides its own version).

-- 
Joseph S. Myers
joseph@codesourcery.com