gnu: elogind: Update to 239.2.

gnu: elogind: Update to 239.2.

* gnu/packages/freedesktop.scm (elogind): Update to 239.2.
[source](patches): Remove elogind-glibc-2.27.patch.
[source](snippet): Remove snippet.
[arguments]:
<#:tests?>: Enable tests.
<#:configure-flags>: Adjust build paths. Disable some tests.
<#:make-flags>: Remove argument.
<#:phases>[patch-locale-header]: Remove phase.
<#:phases>[clean-runpath]: Add phase.
<#:phases>[bootstrap]: Remove phase.
<#:phases>[fix-pkttyagent-path]: Add phase.
<#:phases>[fix-service-file]: Remove phase.
<#:phases>[add-libcap-to-search-path]: Remove phase.
<#:phases>[remove-uaccess-tag]: Remove phase.
<#:phases>[change-pid-file-path]: Add phase.
[build-system]: Switch to meson-build-system.
[native-inputs]: Sort native-inputs list.
Remove gperf package version constraint.
Remove: autoconf, automake, libtool, intltool.
Add: docbook-xml-4.2.
[inputs]: Remove: linux-libre-headers.
* gnu/packages/patches/elogind-glibc-2.27.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove patch file.

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