Kenji Arai / Mbed OS Change_USBMSD_and_USBSerial

function test USBMSD(as external strage for PC USB) and USBSerial. Switching between USBMSD and USBSerial(Not work simultaneously)

see /users/kenjiArai/notebook/usb-interface--usbhost-and-usbdevice/

Diff: mbed-os.lib

Revision:
0:c6dea1f647f6
Child:
1:7a568319eeb7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Mon Jan 06 10:56:13 2020 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#64853b354fa188bfe8dbd51e78771213c7ed37f7