[gegl] meson: Correctly add the VAPI metadata

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 6cb1e4d5278f9a17e4a221fb1ed43f6e4c2a7b44
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Tue Oct 13 15:37:08 2020 +0200

    meson: Correctly add the VAPI metadata

 gegl/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gegl/meson.build b/gegl/meson.build
index 4eee76810..42d29d65c 100644
--- a/gegl/meson.build
+++ b/gegl/meson.build
@@ -134,7 +134,7 @@ if get_option('introspection')
     )
 
     gnome.generate_vapi(api_name,
-      metadata_dirs: '.',
+      metadata_dirs: meson.current_source_dir(),
       sources: gegl_gir[0],
       install: true,
       packages: [