update-mak.sh: adds a check to see if the Makefile.mak needs update
update-mak.sh: adds a check to see if the Makefile.mak needs update

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