scripts/qemuimage-testlib: fix typos

(From OE-Core rev: 69f019c48b40ac3b7a8bce2da819f03072e78020)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/qemuimage-testlib

@@ -83,7 +83,7 @@ Test_SCP()
 	local src=$2
 	local des=$3
 	local tmpfile=`mktemp`
-	local timeout=60
+	local time_out=60
 	local ret=0
 
 	# We use expect to interactive with target by ssh
@@ -116,7 +116,7 @@ Test_SSH()
 	shift
 	local command=$@
 	local tmpfile=`mktemp`
-	local timeout=60
+	local time_out=60
 	local ret=0
 	local exp_cmd=`cat << EOF
 eval spawn ssh -o UserKnownHostsFile=$tmpfile root@$ip_addr "$command"