[file-roller] meson: Use gnome.post_install

[Jan Tojnar <jtojnar src gnome org>]

commit ca1f99d21062bf3ddaa16ea1790e31f68ec9de25
Author: Maximiliano Sandoval R <msandova gnome org>
Date:   Thu Mar 3 16:21:40 2022 +0100

    meson: Use gnome.post_install
    
    Requires meson 0.59

 meson.build    |  8 ++++++--
 postinstall.py | 27 ---------------------------
 2 files changed, 6 insertions(+), 29 deletions(-)
---
diff --git a/meson.build b/meson.build
index e632f38c..3e50ab40 100644
--- a/meson.build
+++ b/meson.build
@@ -20,8 +20,6 @@ datadir = join_paths(prefix, get_option('datadir'))
 privexecdir = join_paths(prefix, get_option('libexecdir'), meson.project_name())
 c_comp = meson.get_compiler('c')
 
-meson.add_install_script('postinstall.py')
-
 # Dependencies
 
 libm_dep = c_comp.find_library('m')
@@ -128,6 +126,12 @@ endif
 subdir('po')
 subdir('src')
 
+gnome.post_install(
+  gtk_update_icon_cache: true,
+  glib_compile_schemas: true,
+  update_desktop_database: true,
+)
+
 # Summary
 
 summary = [