Trac #15873: Update GAP-4.7.4

New tarballs:
* http://boxen.math.washington.edu/home/vbraun/spkg/gap-4.7.4.tar.bz2
* http://boxen.math.washington.edu/home/vbraun/spkg/gap_packages-4.7.4.t
ar.bz2
* http://boxen.math.washington.edu/home/vbraun/spkg/database_gap-4.7.4.t
ar.bz2
* http://boxen.math.washington.edu/home/vbraun/spkg/libgap-4.7.4.tar.gz

URL: http://trac.sagemath.org/15873
Reported by: vbraun
Ticket author(s): Volker Braun
Reviewer(s): Jean-Pierre Flori
fix incorrect permissions for install-sh
Trac #15742: Pkgconfig

Make pkg-config available to Sage

This ticket adds a C implementation of the pkg-config spec together with
a Python interface to Sage. This will be used in the future to make
linking to libraries easier.

Upstream tarballs:
*
http://rabbit.dereferenced.org/~nenolod/distfiles/pkgconf-0.9.4.tar.bz2
* https://pypi.python.org/packages/source/p/pkgconfig/pkgconfig-1.1.0.ta
r.gz

URL: http://trac.sagemath.org/15742
Reported by: vbraun
Ticket author(s): Volker Braun
Reviewer(s): François Bissey, Jean-Pierre Flori