[gdm: 2/4] build: Use GNOME module post_install()

[Ray Strode <halfline src gnome org>]

commit b2f987a7171d18c3382bc0a8da14f3d555efe601
Author: Matt Turner <mattst88 gmail com>
Date:   Tue Aug 23 21:12:50 2022 -0400

    build: Use GNOME module post_install()

 build-aux/meson_post_install.py | 11 -----------
 meson.build                     |  6 ++++--
 2 files changed, 4 insertions(+), 13 deletions(-)
---
diff --git a/meson.build b/meson.build
index f85497473..be0594177 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('gdm', 'c',
   version: '43.0',
   license: 'GPL2+',
-  meson_version: '>= 0.50',
+  meson_version: '>= 0.57',
 )
 
 # Modules
@@ -281,7 +281,9 @@ if xdmcp_dep.found()
 endif
 subdir('docs')
 
-meson.add_install_script('build-aux/meson_post_install.py')
+gnome.post_install(
+  glib_compile_schemas: true,
+)
 
 if meson.version().version_compare('>= 0.53')
 summary({