util: Workaround for gcc-4.7 being unable to deduce noexcept specifications

Change-Id: Ib8b00ff7a6293c4f8596615c4f2af266eab28a1a
Refs: #3384
diff --git a/src/util/signal-scoped-connection.hpp b/src/util/signal-scoped-connection.hpp
index a659844..2e93708 100644
--- a/src/util/signal-scoped-connection.hpp
+++ b/src/util/signal-scoped-connection.hpp
@@ -54,7 +54,7 @@
 
   /** \brief disconnects the connection
    */
-  ~ScopedConnection();
+  ~ScopedConnection() noexcept;
 
   /** \brief disconnects the connection manually
    */