Bug#751563: tuxguitar: depends on xulrunner which is no more

[Emilio Pozuelo Monfort]

Source: tuxguitar
Version: 1.2-19
Severity: serious

Your package depends on:
xulrunner-29 | xulrunner-24.0 | xulrunner-17.0 | xulrunner-10.0 | xulrunner-1.9.1

But iceweasel no longer provides a xulrunner binary. Note that the iceweasel binary
itself ships libxul.so now, so perhaps adding iceweasel (>= 30) as an alternative
might be enough, if that's what tuxguitar needs.

Regards,
Emilio