libtracker-data: Make ASK use the same 'true' and 'false' as xsd:boolean
libtracker-data: Make ASK use the same 'true' and 'false' as xsd:boolean

Fixes NB#245589.

hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker,outofbits/tracker,hoheinzollern/tracker,outofbits/tracker,hoheinzollern/tracker,hoheinzollern/tracker,outofbits/tracker