This adds a file-based test framework to crypto/test. It knows how to
parse formats similar to either upstream's evp_test and our aead_test.

hmac_test has been converted to that with tests from upstream's
evp_test. Upstream tests it against the deprecated EVP_PKEY_HMAC API,
which will be tested by running evp_test against the same input file, to
avoid having to duplicate the test vectors. hmac_test runs those same
inputs against the supported HMAC_CTX APIs.

Change-Id: I9d2b6adb9be519760d1db282b9d43efd6f9adffb
Reviewed-on: https://boringssl-review.googlesource.com/4701
Reviewed-by: Adam Langley <agl@google.com>

Change-Id: I50db70385634c51ed692ac0ebf9732f46130ca41
Reviewed-on: https://boringssl-review.googlesource.com/4125
Reviewed-by: Adam Langley <agl@google.com>

find -name CMakeLists.txt -type f | xargs sed -e 's/\t/  /g' -i

Change-Id: I01636b1849c00ba918f48828252492d99b0403ac

Initial fork from f2d678e6e8 (1.0.2 beta).

(This change contains substantial changes from the original and
effectively starts a new history.)