gnu: coreutils: Patch 'cut' unit test on ARM.

Fixes <https://bugs.gnu.org/26253>.

* gnu/packages/patches/coreutils-cut-huge-range-test.patch: New file.
* gnu/packages/base.scm (coreutils)[native-inputs]: Add it as an input.
[arguments] <#:phases>: On ARM, add 'patch-cut-test' phase.
* gnu/local.mk (dist_patch_DATA): Add 'coreutils-cut-huge-range-test.patch'.

gnu: Add a tzdata variant for testing purposes.

* gnu/packages/base.scm (tzdata-2017a): New variable.
* gnu/packages/glib.scm (glib)[inputs]: Remove tzdata.
[native-inputs]: Add tzdata-2017a.
[arguments]: Add tzdata-2017a to #:disallowed-references.
* gnu/packages/statistics.scm (r)[inputs]: Remove tzdata.
[native-inputs]: Add tzdata-2017a.
[arguments]: Add tzdata-2017a to #:disallowed-references.

gnu: tzdata: Update to 2017a.

* gnu/packages/base.scm (tzdata): Update to 2017a.

gnu: coreutils: Don't run tests in parallel.

* gnu/packages/base.scm (coreutils)[arguments]: Add '#:parallel-tests? #f'
to address a race contition in the test suite.

gnu: grep: Update to 3.0.

* gnu/packages/base.scm (grep): Update to 3.0.

gnu: glibc: Add version 2.24.

* gnu/packages/base.scm (glibc-2.24): New variable.

gnu: glibc: Update to 2.25.

* gnu/packages/base.scm (glibc): Update to 2.25

gnu: grep: Update to 2.28.

* gnu/packages/base.scm (grep): Update to 2.28.

gnu: sed: Update to 4.4.

* gnu/packages/base.scm (sed): Update to 4.4.

gnu: coreutils: Fix cross-compilation.

* gnu/packages/patches/coreutils-fix-cross-compilation.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/base.scm (coreutils)[source]: Use it.

gnu: sed: Do not attempt to rebuild 'doc/sed.1'.

* gnu/packages/base.scm (sed)[arguments]: Add 'dont-rebuild-sed.1'
phase.
[native-inputs]: Remove.

gnu: sed: Use the same phases whether or not we're cross-compiling.

* gnu/packages/base.scm (sed)[arguments]: Make #:phases argument
unconditional.  In 'patch-test-suite' phase, use (which "sh") instead of
referring to the "bash" input.

Merge branch 'master' into python-tests

gnu: glibc/linux: Use /bin/sh instead of /bin/bash as the default shell.

* gnu/packages/base.scm (glibc/linux)[arguments]: Use /bin/sh for scripts that
lack a shebang.

gnu: glibc/linux: Don't replace 'sh' reference with 'bash'.

* gnu/packages/base.scm (glibc/linux)[arguments]: Use /bin/sh instead of
/bin/bash in 'pre-configure' phase.

gnu: gnu-make: Don't replace 'sh' reference with 'bash'.

* gnu/packages/base.scm (gnu-make)[arguments]: Use /bin/sh instead of /bin/bash
in 'set-default-shell' phase.

Merge branch 'master' into core-updates

gnu: sed: Update to 4.3.

* gnu/packages/base.scm (sed): Update to 4.3.
[source]: Use xz tarball. Remove upstreamed patch.
[arguments]: Fix '/bin/sh' -> 'bash' substitution.
[home-page]: Use https.
[native-inputs]: Add perl.
* gnu/packages/patches/sed-hurd-path-max.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: glibc-hurd: Disable werror.

* gnu/packages/base.scm (glibc/hurd)[arguments]: Add "--disable-werror".

gnu: tar: Fix CVE-2016-6321.

* gnu/packages/patches/tar-CVE-2016-6321.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/base.scm (tar)[source]: Use it.

Signed-off-by: Leo Famulari <leo@famulari.name>