tracker-extract: Fix cuesheet track numbers
tracker-extract: Fix cuesheet track numbers

The TrackerToc object only stores entries relevant to the file currently
being extracted. We need to calculate the track number earlier when we
have knowledge of every track in the cue sheet.

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