TEST: Make our test data binary

Our test data (test/data.txt and test/data2.txt) are text files, but
declaring them binary means that there will be no line ending
transformation done

TEST: Make our test data binary

Our test data (test/data.txt and test/data2.txt) are text files, but
declaring them binary means that there will be no line ending
transformation done on them. This is necessary for testing on
non-Unix platforms, where certain tests could otherwise give results
that don't match expected results.

Fixes #13474

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/13477)

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