Example use of the DeepSleepLock class.

Revision:
0:66aac0656e71
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri Oct 27 21:04:30 2017 +0000
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+https://github.com/ARMmbed/mbed-os/#e62a1b9236b44e70ae3b0902dc538481c04d455b