[gdm: 1/2] build: add meson_post_install.py properly

[Ray Strode <halfline src gnome org>]

commit 06bb562f35c3aeb658a4adba423448a69a011135
Author: WORLDofPEACE <worldofpeace protonmail ch>
Date:   Sun Oct 4 03:00:15 2020 -0400

    build: add meson_post_install.py properly

 meson.build | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index a729792c9..7fb3f030e 100644
--- a/meson.build
+++ b/meson.build
@@ -164,7 +164,7 @@ libpam_dep = cc.find_library('pam')
 pam_extensions_supported = cc.has_header_symbol('security/pam_appl.h', 'PAM_BINARY_PROMPT')
 
 default_pam_config = get_option('default-pam-config')
-# If requested, try autodetecting from release files (see NetworkManager source) 
+# If requested, try autodetecting from release files (see NetworkManager source)
 if default_pam_config == 'autodetect'
   pam_autodetect_map = {
     '/etc/redhat-release': 'redhat',
@@ -274,6 +274,8 @@ if xdmcp_dep.found()
 endif
 subdir('docs')
 
+meson.add_install_script('build-aux/meson_post_install.py')
+
 if meson.version().version_compare('>= 0.53')
 summary({
     'datadir': gdm_prefix / get_option('datadir'),