Upgrade to PARI-2.5.2

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/13320">trac #13320</a>.

Diff for the PARI spkg. For reference / review only.

Reported by: jdemeyer

Component: packages

CC: jpflori

Report Upstream: N/A

Authors: Jeroen Demeyer

Dependencies: <a href="http://trac.sagemath.org/sage_trac/ticket/o be merged with #12346">trac #o be merged with #12346</a>

Work issues: 

Reviewers: Marco Streng

Merged in: sage-5.3.beta2

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/13320/pari-2.5.2.p0.diff">pari-2.5.2.p0.diff: Diff for the PARI spkg. For reference / review only.</a> by jdemeyer at 20120804T12:32:42</li></ol>