[vala] Add Signal to known attrs

[Luca Bruno <lucabru src gnome org>]

commit e9cba0d2cc00ce51932418aec929cbfb74dfd004
Author: Luca Bruno <lucabru src gnome org>
Date:   Tue Dec 9 10:08:31 2014 +0100

    Add Signal to known attrs

 vala/valausedattr.vala |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/vala/valausedattr.vala b/vala/valausedattr.vala
index 4a17562..bb090fb 100644
--- a/vala/valausedattr.vala
+++ b/vala/valausedattr.vala
@@ -56,6 +56,7 @@ public class Vala.UsedAttr : CodeVisitor {
                "HasEmitter", "",
                "ReturnsModifiedPointer", "",
                "Deprecated", "since", "replacement", "",
+               "Signal", "detailed", "run", "no_recurse", "action", "no_hooks", "",
                
                "IntegerType", "rank", "min", "max", "",
                "FloatingType", "rank", "",