offload: Remove all the GC roots in case of multiple-output derivations.

* guix/scripts/offload.scm (remove-gc-root): Rename to...
  (remove-gc-roots): ... this.
  [builder]: Use 'scandir' and remove all the files starting with
  %GC-ROOT-FILE.
  (transfer-and-offload): Adjust to renaming; remove
  'false-if-exception' wraps.

gnu: openssl: Upgrade to 1.0.1g (CVE-2014-0160).

* gnu/packages/openssl.scm (openssl): Upgrade to 1.0.1g (for
  CVE-2014-0160, <http://www.openssl.org/news/secadv_20140407.txt>.)

offload: Bail out when failing to register a GC root on the build machine.

* guix/scripts/offload.scm (register-gc-root): Call 'leave' when
  'close-pipe' returns non-zero.

gnu: Add patchutils and quilt

* gnu/packages/patchutils.scm: New file
* gnu/packages/patches/patchutils-xfail-gendiff-tests.patch: New patch
* gnu-system.am (GNU_SYSTEM_MODULES): Add patchutils.
  (dist_patch_DATA): Add patch.

gnu: Python: disable failing tests on MIPS64.

* gnu/packages/patches/python-fix-tests.patch: disable two failing tests on
  MIPS64.

gnu: python: Apply mips n32 fix to bundled libffi.

* gnu/packages/patches/python-libffi-mips-n32-fix.patch: New file.
* gnu/packages/python.scm (python-2, python): Add it.
* gnu-system.am (dist_patch_DATA): Add it.

gnu: linux-libre: Upgrade to 3.13.7.

* gnu/packages/linux.scm (linux-libre): Update to 3.13.7.

gnu: python: Upgrade to 3.3.5.

* gnu/packages/python.scm (python): Upgrade to 3.3.5.

gnu: Python: disable test_wait_result() as it fails on some setups

* gnu/packages/patches/python-fix-tests.patch: disable a failing test.

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

Update 'NEWS' for 0.6.

gnu: lapack: Build shared libraries

* gnu/packages/maths.scm (lapack) [arguments]: Add -DBUILD_SHARED_LIBS to
  #:configure-flags

gnu: fltk: Build shared libraries

* gnu/packages/fltk.scm (fltk) [arguments]: Add to --enable-shared to
  #:configure-flags

utils: Make 'errno' procedure more robust.

Partially fixes <http://bugs.gnu.org/17212>.

* guix/utils.scm (errno): Move definition of 'bv' outside of the
  procedure.  Use 'bytevector-s32-native-ref' or
  'bytevector-s64-native-ref' instead of 'bytevector-sint-ref'.

tests: Avoid buffering in 'fcntl-flock' tests.

Partially fixes <http://bugs.gnu.org/17212>.

* tests/utils.scm ("fcntl-flock wait", "fcntl-flock non-blocking"): Open
  files in binary mode, with no buffering.

gnu: shadow: Make source file timestamps deterministic.

* gnu/packages/admin.scm (shadow)[arguments]: Add 'reset-timestamps'
  phase.

build: Add 'hydra.gnu.org.pub' to the distribution.

* Makefile.am (pkgdata_DATA): Rename to...
  (dist_pkgdata_DATA): ... this.

scheme/bigloo: Fix package description to reflect actual situation

* gnu/packages/scheme.scm (bigloo): Description: Remove the part about the C#
  connection which has been removed since release 3.8a.

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

Add missing space between funcall and string argument

* gnu/packages/scheme.scm (hop): Add missing space.

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

Work around behavior of old 'scandir' in Guile 2.0.5.

Problem reported by John Darrington <john@darrington.wattle.id.au>.

* guix/nar.scm (write-file): Filter out "." and ".." from the result of
  'scandir'.  Previously we did this by passing a suitable predicate.

gnu: icecat: Remove duplicated line.

* gnu/packages/gnuzilla.scm (icecat): Remove duplicate PYTHON-2 input,
  and extraneous 'native-inputs' field.

Co-authored-by: Ludovic Courtès <ludo@gnu.org>