Allow to build zlib and lzma statically

This should fix issues on Darwin.

3rdparty/zlib/examples/gunzip.hs

@@ -0,0 +1,6 @@
+module Main where
+
+import qualified Data.ByteString.Lazy as B
+import qualified Codec.Compression.GZip as GZip
+
+main = B.interact GZip.decompress

3rdparty/zlib/examples/gzip.hs

@@ -0,0 +1,8 @@
+module Main where
+
+import qualified Data.ByteString.Lazy as B
+import qualified Codec.Compression.GZip as GZip
+
+main = B.interact $ GZip.compressWith GZip.defaultCompressParams {
+                      GZip.compressLevel = GZip.BestCompression
+                    }

3rdparty/zlib/examples/zpipe.hs

@@ -0,0 +1,13 @@
+module Main where
+
+import System.Environment
+
+import qualified Data.ByteString.Lazy as B
+import qualified Codec.Compression.Zlib as Zlib
+
+main = do args <- getArgs
+          case args of
+           [] -> B.interact Zlib.compress
+           ["-d"] -> B.interact Zlib.decompress
+           _ -> do name <- getProgName
+                   error $ "usage: " ++ name ++ " [-d] < source > dest"