Generated a random signal out of SDPK1 PWM header 5

Dependencies:   FibonacciLFSR FastPWM

Revision:
0:8c77f47060aa
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Mon Jan 25 16:13:37 2021 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#3a57ec7401a77b8b98f6356a1498cb154229483f