Increase stack size for GHC-7.8.4 tests

servant-docs/test/Servant/DocsSpec.hs

@@ -7,6 +7,7 @@
 {-# LANGUAGE TypeOperators          #-}
 {-# LANGUAGE TypeSynonymInstances   #-}
 {-# OPTIONS_GHC -fno-warn-orphans   #-}
+{-# OPTIONS_GHC -fcontext-stack=100 #-}
 module Servant.DocsSpec where
 
 import           Control.Lens

servant-server/test/Servant/ServerSpec.hs

@@ -10,6 +10,7 @@
 {-# LANGUAGE TypeFamilies         #-}
 {-# LANGUAGE TypeOperators        #-}
 {-# LANGUAGE TypeSynonymInstances #-}
+{-# OPTIONS_GHC -fcontext-stack=100 #-}
 
 module Servant.ServerSpec where