Add erase_storage application example

deploy.py

@@ -947,7 +947,16 @@ if __name__ == "__main__":
       dest="application",
       action="store_const",
       const="store_latency",
-      help=("Compiles and installs the store_latency example."))
+      help=("Compiles and installs the store_latency example which print "
+            "latency statistics of the persistent store library."))
+  apps_group.add_argument(
+      "--erase_storage",
+      dest="application",
+      action="store_const",
+      const="erase_storage",
+      help=("Compiles and installs the erase_storage example which erases "
+            "the storage. During operation the dongle red light is on. Once "
+            "the operation is completed the dongle green light is on."))
   apps_group.add_argument(
       "--panic_test",
       dest="application",