Add missing test file to distribution

Author: harendra-kumar

streamly.cabal

@@ -154,6 +154,7 @@ extra-source-files:
     test/Streamly/Test/Data/MutByteArray/*.hs
     test/lib/Streamly/Test/Common.hs
     test/lib/Streamly/Test/Control/Exception/Common.hs
+    test/lib/Streamly/Test/Data/Scanl/Common.hs
     test/lib/Streamly/Test/Prelude/Common.hs
     test/lib/Streamly/Test/Data/Parser/*.hs
     test/streamly-tests.cabal