added implicit rules make {gen,build,run}.{boardname}[.gdb]
added implicit rules make {gen,build,run}.{boardname}[.gdb]

Change-Id: I1859cad59acbe9dfb77437d43acc321d0797d6a1

chenm001/connectal,cambridgehackers/connectal,cambridgehackers/connectal,hanw/connectal,chenm001/connectal,csail-csg/connectal,hanw/connectal,8l/connectal,csail-csg/connectal,chenm001/connectal,hanw/connectal,8l/connectal,8l/connectal,hanw/connectal,hanw/connectal,chenm001/connectal,cambridgehackers/connectal,cambridgehackers/connectal,csail-csg/connectal,8l/connectal,chenm001/connectal,csail-csg/connectal,csail-csg/connectal,cambridgehackers/connectal,8l/connectal