[gnome-build-meta/alatiera/gtk-broadway] sdk/gtk: update broadway meson arg to be valid

[Jordan Petridis <jpetridis src gnome org>]

commit e133fa8b660d1622c85500386034054cb5fb9b23
Author: Jordan Petridis <jpetridis gnome org>
Date:   Thu Apr 23 19:38:11 2020 +0300

    sdk/gtk: update broadway meson arg to be valid
    
    Partially related to https://gitlab.gnome.org/GNOME/gtk/-/issues/2660

 elements/sdk/gtk.bst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/elements/sdk/gtk.bst b/elements/sdk/gtk.bst
index d8dda073..b51e85b4 100644
--- a/elements/sdk/gtk.bst
+++ b/elements/sdk/gtk.bst
@@ -31,7 +31,7 @@ depends:
 
 variables:
   meson-local: >-
-    -Denable-broadway-backend=true
+    -Dbroadway-backend=true
 
 public:
   bst: