tests: Adjust search-paths test following the introduction of aarch64.

Fixes a regression introduced in
3b88f3767d9f3ad2cc64173525cd53d429bfe7e7.

* tests/search-paths.scm ("evaluate-search-paths, separator is #f"):
Change the expected result to "aarch64-linux".

packages: Catch invalid input errors for structs.

Reported by Thomas Sigurdsen <thomas.sigurdsen@gmail.com>
at <https://lists.gnu.org/archive/html/help-guix/2017-04/msg00007.html>.

* guix/packages.scm (expand-input): Add 'guard' form around call to
'package-source-derivation'.
* tests/packages.scm (dummy): New test.

gexp: 'lower-object' raises an exception when passed an invalid object.

* guix/gexp.scm (&gexp-error, &gexp-input-error): New error conditions.
(lower-object): Raise &gexp-input-error when 'lookup-compiler' returns #f.
* tests/gexp.scm ("lower-object & gexp-input-error?"): New test.
* guix/ui.scm (call-with-error-handling): Add case for 'gexp-input-error?'.

gnu: Add python-mando-0.3.1

* gnu/packages/python.scm (python-mando-0.3.1): New variable.

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

gnu: Add cifs-utils.

* gnu/packages/samba.scm (cifs-utils): New variable.

gnu: python-pexpect: Use python-pytest@3.0.

* gnu/packages/python.scm (python-pexpect, python2-pexpect)[native-inputs]:
Change PYTHON-PYTEST to PYTHON-PYTEST-3.0.

gnu: nss, nss-certs: Update to 3.30.

* gnu/packages/gnuzilla.scm (nss): Update to 3.30.
* gnu/packages/certs.scm (nss-certs): Update to 3.30.
* gnu/packages/patches/nss-increase-test-timeout.patch: Adjust patch context.

gnu: python-cython: Update to 0.25.2.

* gnu/packages/python.scm (python-cython, python2-cython): Update to 0.25.2.

gnu: audacity: Update to 2.1.3.

* gnu/packages/audacity.scm (audacity): Update to 2.1.3.
[source]: Fetch gzipped tar archive instead of a zip archive; remove
unnecessary patch.
[native-inputs]: Add autoconf, automake and libtool.
[arguments]: Add autoreconf phase to detect system libraries.
* gnu/packages/patches/audacity-fix-ffmpeg-binding.patch: Delete patch.
* gnu/local.mk: Remove reference to removed patch.

gnu: emacs-elfeed: Enable tests.

* gnu/packages/emacs.scm (emacs-elfeed)[arguments]: Add a 'check' phase.

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

gnu: brdf-explorer: Use HTTPS source URL.

* gnu/packages/graphics.scm (brdf-explorer)[source]: Use HTTPS URL.

gnu: Use HTTPS URLs for GitHub home-pages.

* gnu/packages/bioinformatics.scm, gnu/packages/emacs.scm,
gnu/packages/haskell.scm, gnu/packages/libffi.scm, gnu/packages/lisp.scm,
gnu/packages/ocaml.scm, gnu/packages/openstack.scm, gnu/packages/python.scm,
gnu/packages/ruby.scm, gnu/packages/shells.scm, gnu/packages/statistics.scm,
gnu/packages/xdisorg.scm: Use HTTPS URLs for all packages with a home-page on
GitHub.

gnu: jbig2dec: Fix CVE-2016-9601.

* gnu/packages/patches/jbig2dec-CVE-2016-9601.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/image.scm (jbig2dec)[source]: Use it.

Merge branch 'core-updates'

gnu: guile-git: Install .go files to /site-ccache.

* gnu/packages/guile.scm (guile-git)[arguments] <bootstrap>: Change
"/ccache" to "/site-ccache" in Makefile.am.

gnu: sddm: Build without greenisland.

This Wayland compositor is currently abandonware and has known problems.

* gnu/packages/display-managers.scm (sddm)[inputs]: Remove GREENISLAND.

gnu: guitarix: Update to 0.35.3.

* gnu/packages/audio.scm (guitarix): Update to 0.35.3.

guix: Compress and decompress xz archives in parallel.

* guix/scripts/pack.scm (%compressors): Add flag '-T0' when calling "xz".
* guix/utils.scm (decompressed-port, compressed-port,
compressed-output-port): Same.

gnu: notmuch: Update to 0.24.1.

* gnu/packages/mail.scm (notmuch, python-notmuch, python2-notmuch): Update to
0.24.1.

Signed-off-by: Marius Bakke <mbakke@fastmail.com>

gnu: khmer: Build with gcc-4.

* gnu/packages/bioinformatics.scm (khmer)[inputs]: Add gcc-4.9.