How to use wait

Revision:
1:9ab7788cda37
Parent:
0:7780c906c1c7
diff -r 7780c906c1c7 -r 9ab7788cda37 mbed-os.lib
--- a/mbed-os.lib	Thu Jan 19 11:34:26 2017 -0600
+++ b/mbed-os.lib	Fri Jun 23 16:42:01 2017 -0500
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#04a31f3b39bfbd69e155ed7c9f55880fd75278ba
+https://github.com/ARMmbed/mbed-os/#c9e63f14085f5751ff5ead79a7c0382d50a813a2