gnu: gtk+: enable introspection.

* gnu/packages/gtk.scm (atk, gdk-pixbuf, gtk+, pango): enable introspection
* guix/build/gnome.scm: New file.

gnu: gobject-introspection: look for 'gcc' when no compiler seems available.

* gnu/packages/patches/gobject-introspection.patch: New file.

gnu: Move numerous "inputs" which should be "native-inputs".

* gnu/packages/avahi.scm, gnu/packages/cdrom.scm, gnu/packages/cryptsetup.scm,
  gnu/packages/curl.scm, gnu/packages/emacs.scm, gnu/packages/fontutils.scm,
  gnu/packages/gdb.scm, gnu/packages/geeqie.scm, gnu/packages/ghostscript.scm,
  gnu/packages/glib.scm, gnu/packages/gnome.scm, gnu/packages/gnunet.scm,
  gnu/packages/gnupg.scm, gnu/packages/gnuzilla.scm, gnu/packages/graphviz.scm,
  gnu/packages/groff.scm, gnu/packages/gstreamer.scm, gnu/packages/gtk.scm,
  gnu/packages/gv.scm, gnu/packages/imagemagick.scm, gnu/packages/irssi.scm,
  gnu/packages/kde.scm, gnu/packages/libcanberra.scm, gnu/packages/libtiff.scm,
  gnu/packages/linux.scm, gnu/packages/lvm.scm, gnu/packages/mp3.scm,
  gnu/packages/netpbm.scm, gnu/packages/parted.scm, gnu/packages/pdf.scm,
  gnu/packages/pulseaudio.scm, gnu/packages/qemu.scm, gnu/packages/qt.scm,
  gnu/packages/ratpoison.scm, gnu/packages/rdf.scm, gnu/packages/slim.scm,
  gnu/packages/texlive.scm, gnu/packages/version-control.scm,
  gnu/packages/video.scm, gnu/packages/vpn.scm, gnu/packages/w3m.scm,
  gnu/packages/xml.scm, gnu/packages/xnee.scm, gnu/packages/xorg.scm,
  gnu/packages/zip.scm:  Move some build-time dependencies from `inputs' to
  `native-inputs'.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

Merge branch 'core-updates'

Conflicts:
	gnu/packages/gnunet.scm

gnu: gettext: Rename binding to 'gnu-gettext'.

* gnu/packages/gettext.scm (gettext): Rename to...
  (gnu-gettext): ... this.  This is used to work around the circular
  dependency introduced in commit c42a4b7, which users with a #:renamer
  cannot cope with.
* gnu/packages/acl.scm, gnu/packages/attr.scm, gnu/packages/cdrom.scm,
  gnu/packages/fdisk.scm, gnu/packages/gkrellm.scm, gnu/packages/glib.scm,
  gnu/packages/gnunet.scm, gnu/packages/grub.scm, gnu/packages/linux.scm,
  gnu/packages/maths.scm, gnu/packages/nano.scm, gnu/packages/parted.scm,
  gnu/packages/system.scm, gnu/packages/version-control.scm,
  gnu/packages/vpn.scm, gnu/packages/w3m.scm, gnu/packages/wget.scm:
  Adjust accordingly.

Merge branch 'master' into core-updates

gnu: glib: Work around test failure in 'gio/tests/network-address.c'.

* gnu/packages/patches/glib-tests-newnet.patch: New file.
* gnu/packages/glib.scm (glib): Use it.
* gnu-system.am (dist_patch_DATA): Add it.

gnu: Use the 'patches' field of <origin>.

* gnu/packages/apr.scm,
  gnu/packages/autotools.scm,
  gnu/packages/avahi.scm,
  gnu/packages/cdrom.scm,
  gnu/packages/cmake.scm,
  gnu/packages/cpio.scm,
  gnu/packages/cross-base.scm,
  gnu/packages/emacs.scm,
  gnu/packages/flex.scm,
  gnu/packages/fontutils.scm,
  gnu/packages/glib.scm,
  gnu/packages/grub.scm,
  gnu/packages/guile.scm,
  gnu/packages/idutils.scm,
  gnu/packages/libevent.scm,
  gnu/packages/linux.scm,
  gnu/packages/mail.scm,
  gnu/packages/make-bootstrap.scm,
  gnu/packages/mp3.scm,
  gnu/packages/oggvorbis.scm,
  gnu/packages/pdf.scm,
  gnu/packages/plotutils.scm,
  gnu/packages/qemu.scm,
  gnu/packages/recutils.scm,
  gnu/packages/rush.scm,
  gnu/packages/scheme.scm,
  gnu/packages/system.scm,
  gnu/packages/tcsh.scm,
  gnu/packages/valgrind.scm,
  gnu/packages/vpn.scm,
  gnu/packages/w3m: Use the 'patches' field of <origin> instead of
  adding a patch as input plus using #:patches.

gnu: Add libsigc++ and glibmm.

* gnu/packages/glib.scm (libsigc++, glibmm): New variable.

gnu: gobject-introspection: Export via #:export.

* gnu/packages/glib.scm: Export 'gobject-instrospection' via the
  #:export clause.

gnu: itstool: Really push the modification announced in 9000d556.

* gnu/packages/glib.scm (itstool): Do as announced in 9000d556.

gnu: itstool: Add propagated inputs python-2 and libxml2.

* gnu/packages/glib.scm (itstool): Add propagated input python-2; it is needed
    to rewrite the shebang in the output python script and must be propagated
    so that PYTHONPATH gets set when using itstool; and libxml2, imported as a
    module by the script.

gnu: glib: Update to 2.38.0.

* gnu/packages/glib.scm (glib): Update to 2.38.0 and drop rewriting of GTESTER.
* gnu/packages/patches/glib-tests-homedir.patch: Update patch for 2.38.0.
* gnu/packages/patches/glib-tests-desktop.patch: Update patch for 2.38.0 and
    drop test dbus-appinfo.

gnu: Add gobject-introspection.

* gnu/packages/glib.scm (gobject-introspection): New variable.

Merge branch 'master' into core-updates

gnu: dbus: Add dependency on libX11.

* gnu/packages/glib.scm: Use #:export instead of 'define-public'.
  (dbus): Add LIBX11 as an input.

Merge branch 'python'

gnu: avahi, dbus: Use /var as $localstatedir.

* gnu/packages/avahi.scm (avahi): Pass '--localstatedir'; add
  'patch/localstatedir'.
* gnu/packages/glib.scm (dbus): Pass '--localstatedir' and
  '--with-session-socket-dir'; add 'patch/localstatedir'.
* gnu/packages/patches/avahi-localstatedir.patch,
  gnu/packages/patches/dbus-localstatedir.patch: New files.
* gnu-system.am (dist_patch_DATA): Add them.

Merge branch 'master' into core-updates

gnu: Add the 'license:' prefix.

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