[sysprof] build: remove deprecated meson feature

[Christian Hergert <chergert src gnome org>]

commit 9c98b10feea62231d49bfddd9ac6eab8b5cce0c5
Author: Christian Hergert <chergert redhat com>
Date:   Fri Apr 1 16:55:19 2022 -0700

    build: remove deprecated meson feature

 src/sysprofd/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/sysprofd/meson.build b/src/sysprofd/meson.build
index 719d3af9..40e0138b 100644
--- a/src/sysprofd/meson.build
+++ b/src/sysprofd/meson.build
@@ -36,7 +36,7 @@ sysprofdconf.set('sysprofdprivdir', pkglibexecdir)
 
 systemdunitdir = get_option('systemdunitdir')
 if systemdunitdir == ''
-  systemdunitdir = dependency('systemd').get_pkgconfig_variable('systemdsystemunitdir')
+  systemdunitdir = dependency('systemd').get_variable(pkgconfig: 'systemdsystemunitdir')
 endif
 
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