Add port flag to remote_rsync_from

Ass ${FLAGS_ssh_port} to ssh arguments for rsync

BUG=chromium-os:9187
TEST=Run rsync-related script with port argument

Change-Id: Iefabef230cfff03dcd66ac0c24798bb4b13ce40d

Review URL: http://codereview.chromium.org/4998004

remote_access.sh

@@ -23,7 +23,7 @@ function remote_cp_to() {
 # Copies a list of remote files specified in file $1 to local location
 # $2.  Directory paths in $1 are collapsed into $2.
 function remote_rsync_from() {
-  rsync -e "ssh -o StrictHostKeyChecking=no -o \
+  rsync -e "ssh -p ${FLAGS_ssh_port} -o StrictHostKeyChecking=no -o \
             UserKnownHostsFile=$TMP_KNOWN_HOSTS" --no-R \
     --files-from=$1 root@${FLAGS_remote}:/ $2
 }