build: fix meson deprecation warning

The library for which a pkg_config is being generated should be
the first parameter to 'generate' and not passed via the
'libraries' property.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ibea4f1ee7962690b7964a01254a5ce657ee02b0a
diff --git a/meson.build b/meson.build
index e7a860a..8dc550c 100644
--- a/meson.build
+++ b/meson.build
@@ -113,7 +113,7 @@
 )
 
 import('pkgconfig').generate(
-    libraries: libphosphor_dbus,
+    libphosphor_dbus,
     name: meson.project_name(),
     version: meson.project_version(),
     description: 'Generated sdbusplus bindings for phosphor-dbus-interfaces'