Modify the BLE LED Control so that it toggles the LED on the other board only if you keep the button pressed

Revision:
0:8c76e25a3cff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/shields/TARGET_CORDIO_BLUENRG.lib	Thu Nov 29 18:32:03 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/cordio-ble-x-nucleo-idb0xa1/#5e49580a0303c48c11f78ad2e5d92b5ffc02aadc