update openssh to 6.2p2 and add sftp-server

Change-Id: I729361293d4c52bcc5cbaf4e5fbb5b3263798c91
Signed-off-by: Peter Wagner <tripolar@gmx.at>
update to openssh 6.3p1

Change-Id: Ibd6a888777f1b481234ed8741394b7f4fed5f8c3
Signed-off-by: Chirayu Desai <cdesai@cyanogenmod.org>
update to openssh 6.4p1

Change-Id: I355b8cba7b633eb779074b00de545b9f830cba4e