[gnome-boxes] build: Use GNOME module post_install()

[Felipe Borges <felipeborges src gnome org>]

commit 594a751e73c051792ac21c8df44e76f56a83ab92
Author: Matt Turner <mattst88 gmail com>
Date:   Tue Aug 23 21:07:43 2022 -0400

    build: Use GNOME module post_install()

 build-aux/post_install.py | 19 -------------------
 meson.build               |  8 ++++++--
 2 files changed, 6 insertions(+), 21 deletions(-)
---
diff --git a/meson.build b/meson.build
index ea0dac85..2b7b18bf 100644
--- a/meson.build
+++ b/meson.build
@@ -2,7 +2,7 @@ project ('gnome-boxes',
          ['vala', 'c'],
          version: '43.beta',
          license: 'LGPLv2+',
-         meson_version: '>= 0.50.0',
+         meson_version: '>= 0.59.0',
 )
 
 gnome = import ('gnome')
@@ -69,7 +69,11 @@ config_h = declare_dependency (
 #configure_file (output: 'config.h', configuration: conf)
 config_h_dir = include_directories ('.')
 
-meson.add_install_script (join_paths ('build-aux', 'post_install.py'), data_dir)
+gnome.post_install(
+  glib_compile_schemas: true,
+  gtk_update_icon_cache: true,
+  update_desktop_database: true,
+)
 
 subdir ('data')
 subdir ('help')