for BLE Nano v2 AD8232

Revision:
0:6fdf43aa5787
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Wed Jul 11 13:18:53 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#03196b244ee00fc748cd4dbfa83b26f3fc0f376b