gnu: isl: Update urls.

* gnu/packages/gcc.scm (isl): Update source and home page url.

gnu: glibc: Fix 'ldd' on x86_64.

Reported by Cyril Roelandt at
<https://lists.gnu.org/archive/html/guix-devel/2013-09/msg00136.html>.

* gnu/packages/patches/glibc-ldd-x86_64.patch: New file.
* gnu-system.am (dist_patch_DATA): Add it.
* gnu/packages/base.scm (glibc): Use it.

utils: 'find-files' returns a sorted list.

* guix/build/utils.scm (find-files): Sort the result lexicographically.
* guix/scripts/pull.scm (unpack): Don't sort the result of 'find-files'.

Merge branch 'master' into core-updates

hydra: Support a 'subset' argument.

* build-aux/hydra/gnu-system.scm (%core-packages): New variable.
  (%packages-to-cross-build): Make an alias for %CORE-PACKAGES.
  (hydra-jobs): Check for the 'subset' argument, and honor it for values
  "all" and "core".

gnu: glibc: Upgrade to 2.18.

* gnu/packages/base.scm (glibc): Upgrade to 2.18.

gnu: linux-libre: Upgrade to 3.11.

* gnu/packages/linux.scm (linux-libre): Upgrade to 3.11.  Add bc as an
  input.

gnu: grub: Add support for building configuration files.

* gnu/packages/grub.scm (<menu-entry>): New record type.
  (grub-configuration-file): New procedure.
* gnu/system/vm.scm (qemu-image): Remove parameters 'linux',
  'linux-arguments', and 'initrd'.  Add 'grub-configuration' parameter.
  Honor them, and remove grub.cfg generation code accordingly.
  (example2): Use `grub-configuration-file', and adjust accordingly.

doc: Add "Data Types and Pattern Matching" to the Coding Style.

* HACKING (Data Types and Pattern Matching): New section.

gnu: Add the 'license:' prefix.

* gnu/packages/glib.scm (itstool): Change 'gpl3+' to 'license:gpl3+'.

gnu: Add itstool.

* gnu/packages/glib.scm (itstool): New variable.

gnu: vm: Add /etc/shadow in the QEMU image.

* gnu/system/vm.scm (qemu-image): Add 'populate' keyword parameter and
  honor it; make it an input.
  (/etc/shadow): New procedure.
  (example2): Call it; build 'populate' script, and pass it to
  'qemu-image'.

gnu: vm: Remove unused 'qemu-image' argument.

* gnu/system/vm.scm (qemu-image): Remove 'boot-expression' parameter,
  superseded by 'linux-arguments'.

gnu: vm: First stab at building a populated QEMU image.

* gnu/packages/linux-initrd.scm (gnu-system-initrd): New variable.
* gnu/system/vm.scm (qemu-image): Add #:linux-arguments parameter.
  [input->name+derivation]: Add case for 'store-path?' items.
  Remove LOADER from `inputs'.

gnu: linux-initrd: Fix creation of /dev/tty nodes.

* guix/build/linux-initrd.scm (make-essential-device-nodes): Make
  /dev/tty.  Change from 'block-special' to 'char-special' for /dev/tty*
  nodes.

gnu: vm: 'qemu-image' populates /dev on the target root file system.

* gnu/system/vm.scm (qemu-image): Use (guix build linux-initrd).  Remove
  'mknod' calls; use 'make-essential-device-nodes' to populate /dev on
  the target image.
* gnu/packages/linux-initrd.scm (qemu-initrd): When /root/dev exists,
  don't call 'make-essential-device-nodes'.

gnu: xorg: Update comment for mesa.

* gnu/packages/xorg.scm (mesa): New compilation trial with 9.2.

gnu: libdrm: Update to 2.4.46.

* gnu/packages/xorg.scm (libdrm): Update to 2.4.46.

hydra: Add Graphviz as an input to the "tarball" job.

* build-aux/hydra/guix.scm (tarball-package): Add GRAPHVIZ to
  `native-inputs'.

hydra: Add Git as an input to the "tarball" job.

* build-aux/hydra/guix.scm (tarball-package): Add `native-inputs' field.