raster → labeling Relation

File in src/core/raster	Includes file in src/core/labeling
qgsrasterlabeling.cpp	qgstextlabelfeature.h
qgsrasterlabeling.h	qgslabelingengine.h
qgsrasterlabeling.h	qgslabelplacementsettings.h
qgsrasterlabeling.h	qgslabelthinningsettings.h