Log Message:
ccid: updated to 1.6.0

1.6.0
- Add support of
  - Aladdin R.D. JCR SecurBio
  - AvidCard CAC Smart Card Reader
  - FujitsuTechnologySolutions GmbH Dual Smartcard Reader D321
  - Ledger Stax
  - NXP Pegoda 3
  - authenton #1- CTAP2.1
- provide files for meson build tool (replaces autoconf/automake)
- Add possibility to set/get NAD on T=1 for MEP
- multi-slots readers
  - Better handling of reader removal
  - Use CLOCK_MONOTONIC for timeouts
- Some other minor improvements