Signed-off-by: Rosen Penev <rosenp@gmail.com>

The last OpenOCD release was 3 years ago, plenty of new functionality
was added since then. Two security-related patches went in too.

While at it, add a menuconfig option to allow building without any USB
dependencies, useful for devices counting on sysfsgpio to access
targets.

Signed-off-by: Paul Fertser <fercerpav@gmail.com>

CVE-2018-5704 - https://nvd.nist.gov/vuln/detail/CVE-2018-5704

Signed-off-by: Jan Pavlinec <jan.pavlinec@nic.cz>