Make MPIR support SAGE_FAT_BINARY on all systems

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/12954">trac #12954</a>.

Diff between the 2.4.0.p3 and 2.4.0.p4 spkgs. For reference / review only.

Reported by: vbraun

Component: packages

CC: jdemeyer,, leif,, jpflori,, mhansen,, kcrisman,, vbraun

Report Upstream: N/A

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: William Stein, Karl-Dieter Crisman

Merged in: sage-5.0.1.rc0

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/12954/mpir-2.4.0.p4.diff">mpir-2.4.0.p4.diff: Diff between the 2.4.0.p3 and 2.4.0.p4 spkgs. For reference / review only.</a> by jdemeyer at 20120527T06:23:49</li></ol>