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.cpp b/src/util/signal-scoped-connection.cpp
index 2ebbb08..64c5774 100644
--- a/src/util/signal-scoped-connection.cpp
+++ b/src/util/signal-scoped-connection.cpp
@@ -55,7 +55,7 @@
   return *this;
 }
 
-ScopedConnection::~ScopedConnection()
+ScopedConnection::~ScopedConnection() noexcept
 {
   m_connection.disconnect();
 }