add back 'run.sh' and 'stop.sh' to start and stop the synchronizer

Change-Id: I1158a4e8357395a5874d5db23621b19c693cae79
(cherry picked from commit 7b99c848e3b99d75d8008192680aa26621a0e682)
diff --git a/xos/synchronizer/stop.sh b/xos/synchronizer/stop.sh
new file mode 100644
index 0000000..489997e
--- /dev/null
+++ b/xos/synchronizer/stop.sh
@@ -0,0 +1,2 @@
+# Kill the observer
+pkill -9 -f vmme-synchronizer.py