Change USBSerial.h constructor to allow to label the stream for, eg., redirecting stdin/out/err to a USBSerial object. Will not break existing default use as tested with mbed-os 5.11.5

Dependents:   max32630fthr_stdout2usb_mbed_v5-11-5 firmware_framework1

Revision:
5:d27e4c226965
Parent:
3:6d85e04fb59f
Child:
7:f8f057664123
--- a/USBMSD/USBMSD.cpp	Sun Oct 14 13:39:27 2012 +0000
+++ b/USBMSD/USBMSD.cpp	Sun Oct 14 15:08:52 2012 +0000
@@ -64,6 +64,9 @@
 
 
 USBMSD::USBMSD(uint16_t vendor_id, uint16_t product_id, uint16_t product_release): USBDevice(vendor_id, product_id, product_release) {
+    stage = READ_CBW;
+    memset((void *)&cbw, 0, sizeof(CBW));
+    memset((void *)&csw, 0, sizeof(CSW));
 }