Merge branch 'master' into core-updates

gnu: icecat: Update to 31.8.0-gnu1.

* gnu/packages/patches/icecat-enable-acceleration-and-webgl.patch: New file.
* gnu/packages/patches/icecat-CVE-2015-2722-pt1.patch,
  gnu/packages/patches/icecat-CVE-2015-2722-pt2.patch,
  gnu/packages/patches/icecat-CVE-2015-2724-pt1.patch,
  gnu/packages/patches/icecat-CVE-2015-2724-pt2.patch,
  gnu/packages/patches/icecat-CVE-2015-2724-pt3.patch,
  gnu/packages/patches/icecat-CVE-2015-2724-pt4.patch,
  gnu/packages/patches/icecat-CVE-2015-2728-pt1.patch,
  gnu/packages/patches/icecat-CVE-2015-2728-pt2.patch,
  gnu/packages/patches/icecat-CVE-2015-2733-pt1.patch,
  gnu/packages/patches/icecat-CVE-2015-2733-pt2.patch,
  gnu/packages/patches/icecat-CVE-2015-2735.patch,
  gnu/packages/patches/icecat-CVE-2015-2736.patch,
  gnu/packages/patches/icecat-CVE-2015-2738.patch,
  gnu/packages/patches/icecat-CVE-2015-2739.patch,
  gnu/packages/patches/icecat-CVE-2015-2740.patch,
  gnu/packages/patches/icecat-CVE-2015-2743.patch: Remove files.
* gnu-system.am (dist_patch_DATA): Remove them, and add the new file.
* gnu/packages/gnuzilla.scm (icecat): Update to 31.8.0-gnu1.  Remove the
  outdated patches and add the new one.

Merge branch 'master' into core-updates

gnu: freetype: Update to 2.6.

* gnu/packages/fontutils.scm (freetype): Update to 2.6.

gnu: libgnome: Move popt to propagated-inputs.

* gnu/packages/gnome.scm (libgnome)[inputs]: Move popt to ...
  [propagated-inputs]: ... here.

gnu: qt: On armhf, enable use of NEON.

* gnu/packages/qt.scm (qt-4)[arguments]: Remove "-no-neon" from arguments
  passed to configure.

gnu: mplayer: Enable use of NEON on armhf.

* gnu/packages/video.scm (mplayer)[arguments]: Remove "--disable-neon" from
  arguments passed to configure.

gnu: python: Set source file times to 1980 to fix test.

* gnu/packages/python.scm (python-2)[arguments]: Use 'modify-phases'.  Return
  true from phases where needed.  Add 'set-source-file-times-to-1980' phase.
  Add (ice-9 ftw) to #:modules.

gnu: libpcap: Enable plain "linux" backend.

* gnu/packages/admin.scm (libpcap)[arguments]: Add "--with-pcap=linux"
  configure flag.

gnu: setbfree: Disable unsupported optimizations on non-x86.

* gnu/packages/music.scm (setbfree)[arguments]: Override default OPTIMIZATIONS
  variable on non-x86 systems.

gnu: eigen: Use parallel-job-count.

* gnu/packages/algebra.scm (eigen)[arguments]: 'current-processor-count' ->
  'parallel-job-count'.

gnu: Build tarballs deterministically.

* gnu/packages/make-bootstrap.scm (tarball-package)[arguments]: Build tarball
  deterministically.
* gnu/packages/admin.scm (isc-dhcp)[arguments]: In 'post-configure' phase,
  create bind.tar.gz deterministically.
* gnu/packages/video.scm (avidemux)[arguments]: In 'repack-ffmpeg' phase,
  create ffmpeg-1.2.1.tar.bz2 deterministically.

packages: patch-and-repack: Build tarballs deterministically.

* guix/packages.scm (patch-and-repack)[build]: When invoking 'tar' to repack
  the archive, pass "--mtime=@0", "--owner=root:0", and "--group=root:0".

gnu: ccache: Update to 3.2.2.

* gnu/packages/ccache.scm (ccache): Update to 3.2.2.
  [arguments]: Rename 'patch-test-shebangs phase to 'setup-tests.  Set the
  SHELL environment variable.

emacs: Fill package heading in Info buffers.

* emacs/guix-info.el (guix-package-info-fill-heading): New variable.
  (guix-package-info-insert-heading): Fill heading if needed.

Co-authored-by: Alex Kost <alezost@gmail.com>

gnu: Add dunst.

* gnu/packages/dunst.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

gnu: Add libxdg-basedir.

* gnu/packages/freedesktop.scm (libxdg-basedir): New variable.

gnu: Adjust packages to new handling of propagated inputs.

This is a followup to 161094c, which gets rid of the "a/b" notation for
propagated inputs.

* gnu/packages/cross-base.scm (cross-gcc-arguments): Change reference from
  "libc/linux-headers" to "linux-headers".
* gnu/packages/emacs.scm (magit-svn): Change "magit/git-modes" to
  "git-modes".

file-systems: Allow users to specify file system UUIDs as strings.

Fixes <http://bugs.gnu.org/19778>.
Reported by Mark H Weaver <mhw@netris.org>.

* gnu/system/file-systems.scm (%uuid-rx): New variable.
  (string->uuid): New procedure.
  (uuid): New macro.
* tests/file-systems.scm: New file.
* Makefile.am (SCM_TESTS): Add it.
* doc/guix.texi (File Systems): Give an example of UUID.

file-systems: Implement partition lookup by UUID.

* gnu/build/file-systems.scm (read-ext2-superblock*, partition-predicate): New
  procedures.
  (partition-label-predicate): Rewrite in terms of 'partition-predicate'.
  (partition-uuid-predicate, find-partition-by-uuid, uuid->string): New
  procedures.
  (%network-byte-order): New macro.
  (canonicalize-device-spec)[canonical-title]: Check whether SPEC is a string.
  [resolve]: New procedure.
  Add 'uuid' case and use it.