Let LinBox build with MPIR > 2.5.0

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/13755">trac #13755</a>.

spkg diff, for review only

Reported by: jpflori

Component: linbox

CC: malb,, pcpa,, vbraun

Report Upstream: Reported upstream. No feedback yet.

Authors: Jean-Pierre Flori

Dependencies: 

Work issues: 

Reviewers: John Palmieri, Volker Braun

Merged in: sage-5.6.beta1

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13755/linbox-1.3.2.p0.diff">linbox-1.3.2.p0.diff: spkg diff, for review only</a> by jpflori at 20121125T15:17:58</li></ol>