Deprecated Bison name-space directive in generated code

[dcavar]

The generated Bison-code uses a deprecated directive for name-space prefixing:

XLE_CONFIG.y:245.1-13: warning: deprecated directive, use ‘%name-prefix’ [-Wdeprecated]
 %name-prefix="xleconfigyy"
 ^^^^^^^^^^^^^

This seems to be related to the previous issues with name-space parameters, see #172

DC