[gnome-klotski] meson: fix typo

[Jeremy Bicha <jbicha src gnome org>]

commit 1f576a07e1567e00207c6bcef8e1c72c1b298bad
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Fri Jan 11 20:40:05 2019 -0500

    meson: fix typo

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 18e4b5c..a11cc94 100644
--- a/meson.build
+++ b/meson.build
@@ -34,4 +34,4 @@ subdir('po')
 subdir('src')
 
 meson.add_install_script(python3.find_python().path(),
-                         join_paths(meson.source_root(), 'build-aux', meson_post_install.py'))
+                         join_paths(meson.source_root(), 'build-aux', 'meson_post_install.py'))