Our tests are linked with gunit_main (or gunit_main_no_google3), which means that main is already defined in another translation unit. Having two main functions violates ODR and hence can result in undefined behavior.

There is no need to fear losing tests. If a build system tries to run a test and there is no main function, then it will fail. Hence, i cannot see a way for this to stop testing a test.

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Credit: Haris Candrian.

See: https://groups.google.com/a/google.com/forum/#!topic/tink-dev/oOrYc6Vr15A.
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(based on cl/196889713 and cl/197018177)

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Also putting all subtle-classes in namespace crypto::tink::subtle.

Change-Id: I47fece5df4ef524521449320d619b13ba8466373
ORIGINAL_AUTHOR=Bartosz Przydatek <przydatek@google.com>
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- Moving wycheproof test vectors to testdata/wycheproof so that
they can be excluded in sync.

- StreamingAeadConfig does not use AeadConfig, removing the
dependency.

- Adding ToString() in a few places.

- Removing unused dependencies in AesGcmBoringSsl.

- Removing TestUtil.getBytes() and renaming TestUtil.getJsonObject
to readJson.

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ORIGINAL_AUTHOR=Thai Duong <thaidn@google.com>
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ORIGINAL_AUTHOR=Thai Duong <thaidn@google.com>
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ORIGINAL_AUTHOR=Quan Nguyen <quannguyen@google.com>
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ORIGINAL_AUTHOR=Daniel Bleichenbacher <bleichen@google.com>
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