scd: Distinguish cancel by user and protocol error.

scd: Distinguish cancel by user and protocol error.

* scd/apdu.h (SW_HOST_CANCELLED): New.
* scd/apdu.c (host_sw_string): Support SW_HOST_CANCELLED.
(pcsc_error_to_sw): Return SW_HOST_CANCELLED for PCSC_E_CANCELLED.
* scd/iso7816.c (map_sw): Return GPG_ERR_INV_RESPONSE for
SW_HOST_ABORTED and GPG_ERR_CANCELED for SW_HOST_CANCELLED.

Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>
(cherry picked from commit 2396055c096884d521c26b76f26263a146207c24)

Gbp-Pq: Topic from-master
Gbp-Pq: Name scd-Distinguish-cancel-by-user-and-protocol-error.patch