Don't use transient strings for attribute data
Don't use transient strings for attribute data

Fixes #1

Yubico/pkcs11test,agrandville/pkcs11test,google/pkcs11test,Yubico/pkcs11test,Yubico/pkcs11test,google/pkcs11test,Yubico/pkcs11test,google/pkcs11test,agrandville/pkcs11test,google/pkcs11test