Put main dir on include path
Put main dir on include path

Now the user can supply their own foo.h that obj_foo/board.h will include

arurke/contiki,MohamedSeliem/contiki,arurke/contiki,MohamedSeliem/contiki,muffinator/libmc1322x,arurke/contiki,MohamedSeliem/contiki,arurke/contiki,bluerover/6lbr,arurke/contiki,arurke/contiki,muffinator/libmc1322x,MohamedSeliem/contiki,bluerover/6lbr,malvira/libmc1322x,MohamedSeliem/contiki,arurke/contiki,bluerover/6lbr,bluerover/6lbr,malvira/libmc1322x,bluerover/6lbr,MohamedSeliem/contiki,bluerover/6lbr,bluerover/6lbr,MohamedSeliem/contiki