Fix Signature.sign broken on x86_64. am: 273e944b63
Fix Signature.sign broken on x86_64.
am: 273e944b63

* commit '273e944b63ee54f13fd96322313e7c98a9c375d2':
  Fix Signature.sign broken on x86_64.

google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt,google/conscrypt