The legacy lttng hasn't worked for awhile and the recipes are now obsolete, so need to be removed.
Fixed by poky/master commits: 4a5ad289d1826957cd22ae9af36bbd127b4816b0 44a485f7a6eff41523a1a37526021c01ec75daef 14363c30ce103f3116d687fd279cb671c6337f9a
Verified in 20b4dcace222d6b1d659a8813b4affad075ec0c6