Fixed "Makefile clean" missing NativeCore directories.
Fixed "Makefile clean" missing NativeCore directories.

jlverhagen/sagetv,BartokW/sagetv,jason-bean/sagetv,troll5501/sagetv,jfthibert/sagetv,andyvshr/sagetv,troll5501/sagetv,BartokW/sagetv,tmiranda1962/sagetv-1,jfthibert/sagetv,JREkiwi/sagetv,gasinger/sagetv,enternoescape/sagetv,jrmull/sagetv,jfthibert/sagetv,JREkiwi/sagetv,andyvshr/sagetv,jrmull/sagetv,troll5501/sagetv,JustFred51/sagetv,JasOXIII/sagetv,JustFred51/sagetv,google/sagetv,tmiranda1962/sagetv-1,stuckless/sagetv,jfthibert/sagetv,jason-bean/sagetv,jlverhagen/sagetv,ckewinjones/sagetv,Slugger/sagetv,skiingwiz/sagetv,jason-bean/sagetv,richard-nellist/sagetv,skiingwiz/sagetv,rflitcroft/sagetv,enternoescape/sagetv,jrmull/sagetv,JREkiwi/sagetv,ckewinjones/sagetv,enternoescape/sagetv,andyvshr/sagetv,jason-bean/sagetv,OpenSageTV/sagetv,webernissle/sagetv,jlverhagen/sagetv,webernissle/sagetv,jusjoken/sagetv,enternoescape/sagetv,gasinger/sagetv,JasOXIII/sagetv,google/sagetv,atarijeff/sagetv,stuckless/sagetv,ckewinjones/sagetv,Slugger/sagetv,JREkiwi/sagetv,jusjoken/sagetv,Slugger/sagetv,rflitcroft/sagetv,JustFred51/sagetv,gasinger/sagetv,rflitcroft/sagetv,gasinger/sagetv,jusjoken/sagetv,atarijeff/sagetv,JasOXIII/sagetv,JustFred51/sagetv,skiingwiz/sagetv,richard-nellist/sagetv,OpenSageTV/sagetv,OpenSageTV/sagetv,jrmull/sagetv,webernissle/sagetv,ckewinjones/sagetv,jlverhagen/sagetv,troll5501/sagetv,skiingwiz/sagetv,tmiranda1962/sagetv-1,atarijeff/sagetv,Slugger/sagetv,richard-nellist/sagetv,webernissle/sagetv,BartokW/sagetv,stuckless/sagetv,atarijeff/sagetv,BartokW/sagetv,OpenSageTV/sagetv,jusjoken/sagetv,andyvshr/sagetv,google/sagetv,stuckless/sagetv,rflitcroft/sagetv,tmiranda1962/sagetv-1,google/sagetv,richard-nellist/sagetv,JasOXIII/sagetv