Updating mbed-os to mbed-os-5.1.1

sg- · sg- · commit 599e91601bee · 2016-08-19T17:43:20.000-05:00
diff --git a/mbed-os.lib b/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#0712b8adf6bbc7eb796d5dac26f95d79d40745ef
+https://github.com/ARMmbed/mbed-os/#0993ae540c5c4b5ce3004bead1aefc0c6d1b3ea0

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-https://github.com/ARMmbed/mbed-os/#0712b8adf6bbc7eb796d5dac26f95d79d40745ef`
	`1`	`+https://github.com/ARMmbed/mbed-os/#0993ae540c5c4b5ce3004bead1aefc0c6d1b3ea0`