SFU: add build script

Author: facchinm

libraries/SFU/extra/build.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+mbed config root .
+mbed deploy
+mbed target NANO_RP2040_CONNECT
+mbed toolchain GCC_ARM
+mbed compile
+set -e
+xxd -i BUILD/NANO_RP2040_CONNECT/GCC_ARM/extra_application.bin > ../src/rp2040.h
+set +e
+#remove last 2 lines
+sed -i '$d' ../src/rp2040.h
+sed -i '$d' ../src/rp2040.h
+#remove first line
+sed -i '1d' ../src/rp2040.h