update for mbed-os-5.11 (and Nboard IHM-V2)

Dependencies:   IHM_V2

Revision:
0:2757d7abb7d9
Child:
1:846c97078558
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Thu Jul 28 13:52:35 2016 +0100
@@ -0,0 +1,1 @@
+https://github.com/mbedmicro/mbed#5fea6e69ec1aec4c56852f2e959002dc815eb480