gnu: r-scales: Update to 0.3.0.

* gnu/packages/statistics.scm (r-scales): Update to 0.3.0.

gnu: csound: Update to 6.05.

* gnu/packages/audio.scm (csound): Update to 6.05.

gnu: Add bitcoin-core.

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

gnu: cgal: Update to 4.6.3.

* gnu/packages/graphics.scm (cgal): Update to 4.6.3.

gnu: pixman: Work around pointer arithmetic bug.

* gnu/packages/patches/pixman-pointer-arithmetic.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/xdisorg.scm (pixman)[source]: Use it.

gnu: avahi: Enable libdns_sd compatibility.

* gnu/packages/avahi.scm (avahi): Add '--enable-compat-libdns_sd' configure
  flag.

gnu: icu4c: Add fixes for CVE-2014-6585 and CVE-2015-1270.

* gnu/packages/patches/icu4c-CVE-2014-6585.patch,
  gnu/packages/patches/icu4c-CVE-2015-1270.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.
* gnu/packages/icu4c.scm (icu4c)[source]: Add patches.

gnu: gtk+: Adapt pre-configure phase to version 3.16.6.

This is a followup to commit a35b8fc6c4ca9b0810db9c8b20bb76158dd66995.

* gnu/packages/gtk.scm (gtk+)[arguments]: In 'pre-configure' phase, remove
  substitutions of 'gtk-update-icon-cache' in demo Makefiles.

gnu: harfbuzz: Comment on the "bin" output.

* gnu/packages/gtk.scm (harfbuzz): Comment on why "bin" output.

gnu: imagemagick: Update to 6.9.2-1.

* gnu/packages/imagemagick.scm (imagemagick): Update to 6.9.2-1.
  [source]: Add imagemagick-test-segv.patch.
  [inputs]: Replace LIBJPEG-8 with LIBJPEG.

gnu: valgrind: Adapt to glibc-2.22 and linux-libre-4.x.

* gnu/packages/patches/valgrind-glibc-2.21.patch: Rename to ...
  gnu/packages/patches/valgrind-glibc-2.22.patch: ... this, and add a case for
  glibc-2.22.
* gnu/packages/patches/valgrind-linux-libre-4.x.patch: New file.
* gnu-system.am (dist_patch_DATA): Add the new file, and rename the other one.
* gnu/packages/valgrind.scm (valgrind)[source]: Add new patch.

gnu: cups-filters: Add glib:bin as a native input.

* gnu/packages/cups.scm (cups-filters)[native-inputs]: Add the bin output
  of the glib package.

gnu: gcc-toolchain: Don't try to delete OUT/bin/sh, which no longer exists.

* gnu/packages/commencement.scm (gcc-toolchain)[arguments]: Remove code that
  deletes OUT/bin/sh and OUT/bin/bash, since those files no longer exist in
  our libc package.

gnu: librsvg: Update to 2.40.10.

* gnu/packages/gnome.scm (librsvg): Update to 2.40.10.

gnu: libgsf: Update to 1.14.34.

* gnu/packages/gnome.scm (libgsf): Update to 1.14.34.

gnu: harfbuzz: Add "bin" output.

* gnu/packages/gtk.scm (harfbuzz)[outputs]: New field.
  [arguments]<#:configure-flags>: Pass '--bindir'.

gnu: harfbuzz: Propagate graphite2 and icu4c.

* gnu/packages/gtk.scm (harfbuzz): Move graphite2 and icu4c to 'propagated-inputs'.
  [source]: Improve formatting.

gnu: util-linux: Adapt util-linux-tests.patch to version 2.27.

This is a followup to commit 57a66c2729b4c3f7363a48eed954386a96137119.

* gnu/packages/patches/util-linux-tests.patch: Adapt to util-linux 2.27.

gnu: util-linux: Update to 2.27.

* gnu/packages/linux.scm (util-linux): Update to 2.27.

gnu: util-linux: Minor fixes.

* gnu/packages/linux.scm (util-linux)[source]: Return #t from the snippet.
  [arguments]: Remove "--enable-ddate" from configure flags, as it is no
  longer recognized (ddate is no longer included in util-linux).