[json-glib] Annotate json_builder_new_immutable()

[Emmanuele Bassi <ebassi src gnome org>]

commit 09091490a45cbe21bb85e670d3565e30c7d1ddd2
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Feb 28 17:09:00 2019 +0000

    Annotate json_builder_new_immutable()
    
    We shouldn't rely on g-ir-scanner doing pattern matching on the name of
    the function to determine if it's a constructor or not.

 json-glib/json-builder.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/json-glib/json-builder.c b/json-glib/json-builder.c
index f8af1cd..0a7f536 100644
--- a/json-glib/json-builder.c
+++ b/json-glib/json-builder.c
@@ -250,7 +250,7 @@ json_builder_new (void)
 }
 
 /**
- * json_builder_new_immutable:
+ * json_builder_new_immutable: (constructor)
  *
  * Creates a new #JsonBuilder instance with its #JsonBuilder:immutable property
  * set to %TRUE to create immutable output trees.