operational SPI with OS5

Revision:
31:d960851a7d2c
Parent:
30:f5b42453b3f9
Child:
32:19ac154228ba
--- a/mbed-os.lib	Thu Mar 09 11:00:03 2017 +0000
+++ b/mbed-os.lib	Tue Mar 14 14:00:04 2017 +0000
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#305f5c491e34d86098e9da91b322017549c189ff
+https://github.com/ARMmbed/mbed-os/#f4864dc6429e1ff5474111d4e0f6bee36a759b1c