pcsclite: 1.8.16 -> 1.8.17

Upstream changes:

  - Fix SCardEndTransaction() issue with a SCARD_SHARE_EXCLUSIVE
    connection
  - Fix an issue when used with systemd (problem in signal handler)
  - SCardGetAttrib(): set pcbAttrLen when buffer is too small
  - Doxygen: SCardGetAttrib() pbAttr can be NULL
  - Doxygen: SCardGetAttrib() *pcbAttrLen contains the buffer size
  - fix compilation warnings and link errors on SunOS
  - Some other minor improvements

Signed-off-by: aszlig <aszlig@redmoonstudios.org>
Cc: @viric, @wkennington