Upgrade PARI to 2.7.1

[jdemeyer]

Upstream: http://pari.math.u-bordeaux.fr/pub/pari/unix/pari-2.7.1.tar.gz

Updated (changes have always been made directly in the source tarball and the package will be removed anyway in #15808): http://boxen.math.washington.edu/home/jdemeyer/spkg/genus2reduction-20140211.tar.bz2

Depends on #15888
Depends on #15855

CC: @jpflori @pjbruin @SnarkBoojum

Component: packages: standard

Author: Jeroen Demeyer

Branch/Commit: bf435f8

Reviewer: Peter Bruin

Issue created by migration from https://trac.sagemath.org/ticket/15767

[pjbruin]

comment:1

Good plan; there have been quite a few changes (also in the interface) from 2.5 to 2.6, but 2.7 (being a stable release) will be close to 2.6.2.

[jdemeyer]

Changed dependencies from #15765 to #15765, #15774

[jdemeyer]

Branch: u/jdemeyer/ticket/15767

[jdemeyer]

Author: Jeroen Demeyer

[jdemeyer]

New commits:

17f864c	Remove mp.c.patch; instead call init_memory_functions()
ad63daf	Move PARI databases out of PARI package
1678b89	Merge remote-tracking branch 'origin/develop' into ticket/15765
bfdad13	Merge branch 'u/jdemeyer/ticket/15765' of git://trac.sagemath.org/sage into ticket/15774
0595a42	Upgrade to PARI 2.6.2

[jdemeyer]

Commit: 0595a42

[jdemeyer]

Description changed:

--- 
+++ 
@@ -1 +1,3 @@
 PARI 2.7 is not yet released, but we can prepare for the release by packaging PARI-2.6.2
+
+**Upstream**: [http://boxen.math.washington.edu/home/jdemeyer/spkg/pari-2.6.2.beta.tar.bz2](http://boxen.math.washington.edu/home/jdemeyer/spkg/pari-2.6.2.beta.tar.bz2)

[sagetrac-git]

Changed commit from 0595a42 to 6de648b

[sagetrac-git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

6de648b

Upgrade to PARI 2.6.2