Upgrade genus2reduction due to Pari upgrade to svn snapshot 12577 - a pre-release of Pari 2.4.3

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/9591">trac #9591</a>.

New complete patch including trac_9591-g2red_remove_dist.patch

Reported by: jdemeyer

Component: packages

CC: 

Report Upstream: N/A

Authors: Jeroen Demeyer, Mitesh Patel

Dependencies: 

Work issues: 

Reviewers: François Bissey, Mitesh Patel, Leif Leonhardy

Merged in: sage-4.6.alpha0

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/9591/genus2reduction-spkg.patch">genus2reduction-spkg.patch: Complete spkg patch (for reference)</a> by jdemeyer at 20100821T12:44:14</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/9591/trac_9591-g2red_remove_dist.patch">trac_9591-g2red_remove_dist.patch: Remove `dist/`.  spkg patch.  Apply on top of "complete" patch.</a> by mpatel at 20100904T07:22:44</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/9591/genus2reduction-spkg.2.patch">genus2reduction-spkg.2.patch: New complete patch including trac_9591-g2red_remove_dist.patch</a> by jdemeyer at 20100905T13:36:53</li></ol>