UDP Socket application to read current time from network.

This is an UDP example to read current UTC time by sending request to NIST Internet Time Service.

Revision:
0:b90f9dc5cf9c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Wed Oct 18 21:59:15 2017 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#6e0d01cd13e8aca7bf4d697c3699ec9225386881