demostration for TimeoutAbs

Dependencies:   TimeoutAbs

Demo absolute timeout.

Event occurs at absolute time instead of relative to when attach() called. Random delay is added to show independence from when attach() is called.

Revision:
0:3985faffb331
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Mon Nov 26 14:37:06 2018 -0800
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#2fd0c5cfbd83fce62da6308f9d64c0ab64e1f0d6