Makefile: fix sed for linux
Makefile: fix sed for linux

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