gnu: %bootstrap-coreutils&co: Patch egrep/fgrep to work regardless of $PATH.

This is the bootstrap version of 1063d325ea76aa2b00dfcd3d436b16e412103df1

* gnu/packages/bootstrap.scm (%bootstrap-coreutils&co)[source]: Patch
the absolute location of 'grep' when called from 'egrep' or 'fgrep'.

Merge remote-tracking branch 'origin/master' into core-updates

gnu: bash: Update to patch level 12.

* gnu/packages/bash.scm (%patch-series-4.4): Add patch 12.

gnu: coreutils: Don't run tests in parallel.

* gnu/packages/base.scm (coreutils)[arguments]: Add '#:parallel-tests? #f'
to address a race contition in the test suite.

gnu: libpng: Update to 1.6.28.

* gnu/packages/image.scm (libpng): Update to 1.6.28.
[source]: Remove patch.
* gnu/packages/patches/libpng-CVE-2016-10087.patch: Remove file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: ardour: Update to 5.6.

* gnu/packages/audio.scm (ardour): Update to 5.6.

gnu: linux-libre: Update to 4.10.  Keep 4.9 as longterm release.

* gnu/packages/linux.scm (%linux-libre-version): Update to 4.10.
(%linux-libre-hash): Update hash.
(linux-libre-4.9): New variable.
* gnu/packages/linux-libre-4.10-x86_64.conf,
gnu/packages/linux-libre-4.10-i686.conf: New files.
* Makefile.am (KCONFIGS): Add them.

gnu: libpng: Update source urls.

* gnu/packages/image.scm (libpng)[source]: Add 'history' location for
older versions.

gnu: Add python-cycler.

* gnu/packages/python.scm (python-cycler, python2-cycler): New variables.

gnu: Remove xf86-video-modesetting.

This is part of xorg-server since version 1.17:

https://cgit.freedesktop.org/xorg/xserver/commit/?id=35dc7c75150733dbcef8a18b6796f49a7c48ebee

* gnu/packages/xorg.scm (xf86-video-modesetting): Remove variable.
* gnu/services/xorg.scm (xorg-configuration-file, %default-xorg-modules):
Adjust accordingly.

gnu: jemalloc: Update to 4.4.0.

* gnu/packages/jemalloc.scm (jemalloc): Update to 4.4.0.
[source, home-page]: Update to current URLs.

gnu: qtractor: Use new home page.

* gnu/packages/music.scm (qtractor)[home-page]: Use new home page.

gnu: qtractor: Update to 0.8.1.

* gnu/packages/music.scm (qtractor): Update to 0.8.1.

gnu: linux-libre: Update to 4.9.11.

* gnu/packages/linux.scm (%linux-libre-version): Update to 4.9.11.
(%linux-libre-hash): Update hash.

gnu: linux-libre@4.4: Update to 4.4.50.

* gnu/packages/linux.scm (linux-libre-4.4): Update to 4.4.50.

gnu: glibc-bootstrap-system.patch: Update for glibc-2.25.

* gnu/packages/patches/glibc-bootstrap-system.patch: Revert a change
from glibc-2.25 which would require the bootstrap-glibc to require the
linux-kernel-headers.

gnu: ntfs-3g: Fix patch for CVE-2017-0358.

This is a followup to commit 1a82ba660e88e731841882523084e5d878267b53.

* gnu/packages/patches/ntfs-3g-CVE-2017-0358.patch: Make patch apply.

gnu: pioneers: Update to 15.4.

* gnu/packages/games.scm: Update to 15.4.

Signed-off-by: Kei Kebreau <kei@openmailbox.org>

Revert "updated pioneers to latest version."

This reverts commit 2f7eccc048de6526ef3f4c2de1c67ea0455ccb0c.

updated pioneers to latest version.

Signed-off-by: Kei Kebreau <kei@openmailbox.org>