Template for mbed-os

Revision:
0:30c2b4019a20
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Tue Sep 18 13:39:05 2018 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#949cb49ab0a144da0e3b04b6af46db0cd2a20d75