remove *-stamp when cleaning
remove *-stamp when cleaning

CTU-IIG/802.11p-iw,cozybit/iw,greearb/iw-ct,bw-oss/iw,OSLL/iw,bw-oss/iw,Distrotech/iw,bcopeland/android_iw,TeamEOS/external_iw,timduru/platform-external-iw,timduru/platform-external-iw,chunyeow/iw,ewa/iw-modified,greearb/iw-ct,Distrotech/iw,cozybit/iw,chunyeow/iw,CTU-IIG/802.11p-iw,SoluMachines/external_iw,ewa/iw-modified,TeamEOS/external_iw,idor/iw,OSLL/iw,SoluMachines/external_iw,bcopeland/android_iw,idor/iw