lisa.target: Add Target(devlib-file-xfer) parameter
lisa.target: Add Target(devlib-file-xfer) parameter

Allow specifying which file transfer protocol to use
for linux targets. Currently available are "sftp"
(default) and "scp".

credp/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa,ARM-software/lisa,credp/lisa,ARM-software/lisa,credp/lisa