[gnome-builder] code: add missing g-i args

[Christian Hergert <chergert src gnome org>]

commit 42a96e4af05200c76d95f873dd132b445c9b6f9f
Author: Christian Hergert <chergert redhat com>
Date:   Mon Mar 11 16:52:01 2019 -0700

    code: add missing g-i args
    
    This is from tintou's vala out-of-process branch.

 src/libide/code/ide-symbol.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/libide/code/ide-symbol.c b/src/libide/code/ide-symbol.c
index b1dc0b407..d9e8c41f0 100644
--- a/src/libide/code/ide-symbol.c
+++ b/src/libide/code/ide-symbol.c
@@ -508,6 +508,8 @@ ide_symbol_new_from_variant (GVariant *variant)
 
 /**
  * ide_symbol_new:
+ * @location: (nullable):
+ * @header_location: (nullable):
  *
  * Returns: (transfer full): an #IdeSymbol
  *