J-Link Unsupported firmware version check

J-Link Unsupported firmware version check

OpenOCD does not work with the latest firmware versions
of Segger J-Link.

Latest working version: V4.42c
Unsupported versions: 4.44 to 4.46f, 4.20 to 4.30

Older versions of firmware can be found here:
  http://www.segger.com/j-link-older-versions.html

The firmware versions does not correspond directly with
"Software and documentation pack for Windows", it may be
distinguished by the "compile" date in the information string.

Print an warning message if unsupported firmware version detected.

Change-Id: Id7d1f965b8ce2fdbcd0026a85ddd093e2fa48720
Signed-off-by: Alexander Osipenko <sipych@gmail.com>
Reviewed-on: http://openocd.zylin.com/666
Tested-by: jenkins
Reviewed-by: Xiaofan <xiaofanc@gmail.com>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>