(GPGME::Ctx#sign_result): Fix typo gpgme_sign_result ->  gpgme_op_sign_result.  (Bug#24062)
(GPGME::Ctx#sign_result): Fix typo gpgme_sign_result -> 
gpgme_op_sign_result.  (Bug#24062)


ueno/ruby-gpgme,ueno/ruby-gpgme,ueno/ruby-gpgme