elogind: fix build on musl without basename compatibility decl

musl provided a compatibility basename declaration so applications
expecting GNU basename could still compile even though musl doesn't provide
GNU basename and only POSIX basename.

Prevent build failure when this is removed.

srcpkgs/elogind/patches/musl-basename.patch

@@ -0,0 +1,42 @@
+Add missing include for POSIX basename, since systemd-logind expects basename in string.h
+
+diff -rup src/basic/musl_missing.h.orig src/basic/musl_missing.h
+--- a/src/basic/musl_missing.h
++++ b/src/basic/musl_missing.h
+@@ -56,6 +54,10 @@ void elogind_set_program_name(const char
+         } ) )
+ #endif
+ 
++/* Poor man's basename */
++#define basename(path) \
++        (strrchr(path, '/') ? strrchr(path, '/')+1 : path)
++
+ /* getnameinfo(3) glibc extensions are undefined in musl libc */
+ #define NI_IDN 0
+ #define NI_IDN_USE_STD3_ASCII_RULES 0
+From c8d96ff2b87b8dfb8d521d4c2e6fb57992dbf659 Mon Sep 17 00:00:00 2001
+From: Lennart Poettering <lennart@poettering.net>
+Date: Wed, 21 Dec 2022 16:13:23 +0100
+Subject: [PATCH] tests: we don't actually use basename() anymore
+
+---
+ src/shared/tests.c | 6 ------
+ 1 file changed, 6 deletions(-)
+
+diff --git a/src/shared/tests.c b/src/shared/tests.c
+index 5a05daa643..9d8bbeea79 100644
+--- a/src/shared/tests.c
++++ b/src/shared/tests.c
+@@ -7,12 +7,6 @@
+ #include <sys/mount.h>
+ #include <sys/wait.h>
+ 
+-/* When we include libgen.h because we need dirname() we immediately
+- * undefine basename() since libgen.h defines it as a macro to the POSIX
+- * version which is really broken. We prefer GNU basename(). */
+-#include <libgen.h>
+-#undef basename
+-
+ #include "sd-bus.h"
+ 
+ #include "alloc-util.h"

srcpkgs/elogind/template

@@ -1,7 +1,7 @@
 # Template file for 'elogind'
 pkgname=elogind
 version=252.9
-revision=1
+revision=2
 build_style=meson
 configure_args="-Dcgroup-controller=elogind -Ddefault-hierarchy=legacy
  -Ddefault-kill-user-processes=false -Dhalt-path=/usr/bin/halt