Swiss-army-knife file compressor/archiver

#2Testing from sdist fails due to missing extra-source-file

test/data/minilzo.c.lzo is used in the tests, but is missing from extra-source-files in the Cabal. This breaks tests if you try to run them from an sdist, or build with certain Nix tools (which pick files in a similar way to sdist).

Should be easily resolved by adding the test data into extra-source-files, to be distributed with the sdist:

extra-source-files:
    cbits/minilzo.h
    cbits/lzodefs.h
    cbits/lzoconf.h
    test/data/minilzo.c.lzo