gnu: r-with-tests: Fix reference to grep.

detectCores.R fails to return the number of cores when running R in a
container without grep.

Reported-by: Jonas Freimuth.

* gnu/packages/statistics.scm (r-with-tests)[arguments]: Fix references to
grep and wc in detectCores.R.
[inputs]: Add grep.

gnu: capypdf: Update to 0.4.0.

* gnu/packages/pdf.scm (capypdf): Update to 0.4.0.

gnu: mesa: Fix Vulkan on older Intel GPUs.

Mesa split the Vulkan intel driver into two: intel and intel_hasvk.
Enables intel_hasvk so vulkan functions on older intel GPUs again, and
swrast for lavapipe as a fallback.

* gnu/packages/gl.scm (mesa-vulkan-hasvk): New variable.
(mesa): Graft with mesa-vulkan-hasvk.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu: Add emacs-weyland-yutani-theme.

* gnu/packages/emacs-xyz.scm (emacs-weyland-yutani-theme): New variable.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu: Add emacs-elfeed-goodies

* gnu/packages/emacs-xyz.scm (emacs-elfeed-goodies): New variable.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu: Add emacs-popwin.

 * gnu/packages/emacs-xyz.scm (emacs-popwin): new variable.

Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu: Add python-ovh.

* gnu/packages/python-web.scm (python-ovh): New variable.

gnu: wimlib: Update to 1.14.1.

* gnu/packages/backup.scm (wimlib): Update to 1.14.1.
[inputs]: Upgrade fuse to fuse-3.

gnu: qpwgraph: Update to 0.4.5.

* gnu/packages/audio.scm (qpwgraph): Update to 0.4.5.

gnu: rdiff-backup: Update to 2.2.5.

* gnu/packages/backup.scm (rdiff-backup): Update to 2.2.5.

gnu: snapraid: Update to 12.2.

* gnu/packages/backup.scm (snapraid): Update to 12.2.

gnu: oath-toolkit: Mark up description.

* gnu/packages/authentication.scm (oath-toolkit)[synopsis, description]:
Use @acronym{}.

gnu: oath-toolkit: Update to 2.6.9.

* gnu/packages/authentication.scm (oath-toolkit): Update to 2.6.9.
[source]: Remove patch.
* gnu/packages/patches/oath-toolkit-xmlsec-compat.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu: stoken: Use HTTPS home page.

* gnu/packages/crypto.scm (stoken)[home-page]: Use HTTPS.

gnu: Remove top-level (guix build utils) import.

* gnu/packages/game-development.scm: Don't import (guix build utils) here.

gnu: signify: Use G-expressions.

* gnu/packages/crypto.scm (signify)[arguments]:
Rewrite as G-expressions.

gnu: signify: Update to 31.

* gnu/packages/crypto.scm (signify): Update to 31.

gnu: libxcrypt: Update to 4.4.36.

* gnu/packages/crypto.scm (libxcrypt): Update to 4.4.36.

gnu: xtl: Use G-expressions.

* gnu/packages/cpp.scm (xtl)[arguments]:
Rewrite as G-expressions.

gnu: xtl: Update to 0.7.5.

* gnu/packages/cpp.scm (xtl): Update to 0.7.5.