scd: Handle CCID bwi of time extension.

* scd/ccid-driver.c (bulk_in): Increase timeout by the multiplier
value as defined section 6.2.6 in CCID specification.

For TPDU level transfer, it was handled. This is fix for APDU level
transfer.

• GnuPG-bug-id: T4646
• Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>