fix build issues on ghc 7.10

source/Network/Xmpp/Sasl/Common.hs

@@ -1,6 +1,7 @@
 {-# OPTIONS_HADDOCK hide #-}
 {-# LANGUAGE PatternGuards #-}
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE FlexibleContexts #-}
 
 module Network.Xmpp.Sasl.Common where
 

source/Network/Xmpp/Tls.hs

@@ -2,6 +2,7 @@
 {-# LANGUAGE DeriveDataTypeable #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE PackageImports #-}
+{-# LANGUAGE FlexibleContexts #-}
 
 module Network.Xmpp.Tls where