[Makefile] Turn off debugging by default
[Makefile] Turn off debugging by default

erexhepa/vlfeat,vlfeat/vlfeat,CansenJIANG/vlfeat,vlfeat/vlfeat,CansenJIANG/vlfeat,CansenJIANG/vlfeat,j-bo/vlfeat,mylxiaoyi/vlfeat,rxl194/vlfeat,CansenJIANG/vlfeat,CansenJIANG/vlfeat,rxl194/vlfeat,vlfeat/vlfeat,mylxiaoyi/vlfeat,qubick/vlfeat,qubick/vlfeat,CansenJIANG/vlfeat,WangDequan/vlfeat,WangDequan/vlfeat,hongzhili/vlfeat,richarddzh/vlfeat,erexhepa/vlfeat,cvfish/vlfeat,richarddzh/vlfeat,WangDequan/vlfeat,j-bo/vlfeat,rxl194/vlfeat,j-bo/vlfeat,cvfish/vlfeat,qubick/vlfeat,hongzhili/vlfeat,cvfish/vlfeat,richarddzh/vlfeat,mylxiaoyi/vlfeat,cvfish/vlfeat,qubick/vlfeat,cvfish/vlfeat,j-bo/vlfeat,WangDequan/vlfeat,erexhepa/vlfeat,WangDequan/vlfeat,cvfish/vlfeat,qubick/vlfeat,erexhepa/vlfeat,rxl194/vlfeat,richarddzh/vlfeat,WangDequan/vlfeat,rxl194/vlfeat,qubick/vlfeat,mylxiaoyi/vlfeat,hongzhili/vlfeat,hongzhili/vlfeat,vlfeat/vlfeat,vlfeat/vlfeat,hongzhili/vlfeat,erexhepa/vlfeat,rxl194/vlfeat,richarddzh/vlfeat,hongzhili/vlfeat,mylxiaoyi/vlfeat,erexhepa/vlfeat,j-bo/vlfeat,vlfeat/vlfeat,mylxiaoyi/vlfeat,richarddzh/vlfeat