Add the include dir also to tests.

This worked with Typeable because Typeable from `base` instead of
`containers` was used.

containers.cabal

@@ -85,6 +85,7 @@ Test-suite map-lazy-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -102,6 +103,7 @@ Test-suite map-strict-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -119,6 +121,7 @@ Test-suite set-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -136,6 +139,7 @@ Test-suite intmap-lazy-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -153,6 +157,7 @@ Test-suite intmap-strict-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -170,6 +175,7 @@ Test-suite intset-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -187,6 +193,7 @@ Test-suite deprecated-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -202,6 +209,7 @@ Test-suite seq-properties
 
     build-depends: base >= 4.2 && < 5, array, deepseq >= 1.2 && < 1.5, ghc-prim
     ghc-options: -O2
+    include-dirs: include
     extensions: MagicHash, DeriveDataTypeable, StandaloneDeriving, Rank2Types
 
     build-depends:
@@ -225,6 +233,7 @@ test-suite map-strictness-properties
     test-framework-quickcheck2 >= 0.2.9
 
   ghc-options: -Wall
+  include-dirs: include
 
 test-suite intmap-strictness-properties
   hs-source-dirs: tests, .
@@ -242,3 +251,4 @@ test-suite intmap-strictness-properties
     test-framework-quickcheck2 >= 0.2.9
 
   ghc-options: -Wall
+  include-dirs: include