Add Harbour preprocessor options

[RobertvanderHulst]

Harbour has the following extra options in the preprocessor

#UNTRANSLATE - Remove UDC defined with #TRANSLATE
#XUNTRANSLATE - Remove UDC defined with #XTRANSLATE
#UNCOMMAND - Remove UDC defined with #COMMAND
#XUNCOMMAND- Remove UDC defined with #XCOMMAND
#YTRANSLATE - Like #XTRANSLATE but case-sensitive
#YCOMMAND - Like #XCOMMAND but case-sensitive
#YUNTRANSLATE- Like #XUNTRANSLATE but case-sensitive
#YUNCOMMAND- Like #XUNCOMMANDbut case-sensitive

[RobertvanderHulst]

Implemented #Ycommand and #YTranslate

[RobertvanderHulst]

Will not implement #UNCOMMAND etc. Does not really make sense.

[cpyrgas]

Confirmed done