add missing scripts to repo

scripts/0-listen-for-serial

@@ -0,0 +1,5 @@
+#!/bin/sh
+set -ex
+# Capture serial output
+cd /tmp
+touch itm.txt && itmdump -F -f itm.txt

scripts/1-openocd

@@ -0,0 +1,7 @@
+#!/bin/sh
+set -ex
+# Flashing requires openocd to be listening for connections
+cd /tmp
+openocd -f interface/stlink-v2-1.cfg -f target/stm32f3x.cfg	
+
+# then in a different tab, just `cargo run`