[libgda] Meson: fix sqlite files name generation as subproject

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit e1b5573bf40b259eaf1bcb415e9980dc61c04dae
Author: Daniel Espinosa <esodan gmail com>
Date:   Mon Apr 8 18:23:49 2019 -0500

    Meson: fix sqlite files name generation as subproject

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index fcf8d9641..ca70e6b29 100644
--- a/meson.build
+++ b/meson.build
@@ -272,7 +272,7 @@ sqlite_xml_fnames = [
        ]
 sqlite_xml_fnamesext = []
 foreach fn : sqlite_xml_fnames
-       sqlite_xml_fnamesext += [join_paths(meson.source_root(), 'providers','sqlite',fn+'.xml.in')]
+       sqlite_xml_fnamesext += [join_paths(meson.current_source_dir(), 'providers','sqlite',fn+'.xml.in')]
 endforeach
 
 sqlite_xml_inf = files(sqlite_xml_fnamesext)