python-numpy: Bump to the most recent release 1.13.1

python-numpy: Bump to the most recent release 1.13.1

Note previously used location for releases on SourceForge is no longer
supported (latest tarball v1.11.2 available there is dated 2016-10-04)
so as other distros
(see, Fedora http://pkgs.fedoraproject.org/cgit/rpms/numpy.git/tree/numpy.spec?id=7013948f8ba073c69a91a545f0a0898cb62652fa#n22)
we get release tarball directly from GitHub.

Also note 0001-no-fenv-on-uclibc.patch was rebased on v1.13.1.

0002-Don-t-blindly-enable-frexpl-and-ldexpl-for-uClibc.patch is no
longer needed. Since https://github.com/numpy/numpy/pull/4852, there
is a wrapper for frexpl and ldexpl like for the other math functions.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Rahul Bedarkar <rahulbedarkar89@gmail.com>
Cc: Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Cc: Peter Korsgaard <peter@korsgaard.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Arnout: improve explanation of 0002-Don-t-blindly-enable-frexpl-and-ldexpl-for-uClibc.patch]
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>