configure.ac: Fix boringssl detection.

BoringSSL changed since curl started supporting it.
In particular:
* crypto.h does not contain CRYPTO_add_lock anymore.
  - replaced by a check for SSLeay.
* BoringSSL added DES_set_odd_parity back.
  - replaced by a check for OPENSSL_IS_BORINGSSL being defined.

BUG: 22347561
Change-Id: Idd0abe6d57177faded92a6150a1f6d1f4009a74b