A 32bit BFD patch

[Mark Mitchell]

H.J., what exactly are the places that fail on a 32-bit host?  I made
an effort to conditionalize the places that required 64-bit support
with `#ifdef BFD_64' (or BFD64, I forget which one is the right
spelling). 

If you can tell me where the problems lie, I bet I conditionalize the
right sections.

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Mark Mitchell                   mark@codesourcery.com
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