Missing constant in ISO7816.java

[vletoux]

The constant SW_COMMAND_CHAINING_NOT_SUPPORTED is missing

Reference: http://www.win.tue.nl/pinpasjc/docs/apis/jc222/javacard/framework/ISO7816.html#SW_COMMAND_CHAINING_NOT_SUPPORTED

Underlying code: https://github.com/martinpaljak/vJCRE/blob/85c7828089fcde0fa8cde89a622b5ec582804947/src/javacard/framework/ISO7816.java

missing line: short SW_COMMAND_CHAINING_NOT_SUPPORTED = 0x6884;