check for existing tool folders, store last LINUX_BUILD
check for existing tool folders, store last LINUX_BUILD

luetgendorf/Espruino,luetgendorf/Espruino,wilberforce/Espruino,wilberforce/Espruino,wilberforce/Espruino,lancernet/Espruino,luetgendorf/Espruino,wilberforce/Espruino,lancernet/Espruino,lancernet/Espruino,wilberforce/Espruino,luetgendorf/Espruino,luetgendorf/Espruino,wilberforce/Espruino,lancernet/Espruino,lancernet/Espruino,lancernet/Espruino,luetgendorf/Espruino,lancernet/Espruino,luetgendorf/Espruino,wilberforce/Espruino