Added warning for uncertified boards

Author: Federico Fissore

boards.txt

@@ -2,6 +2,9 @@
 arduino_due_x_dbg.name=Arduino Due (Programming Port)
 arduino_due_x_dbg.vid.0=0x2341
 arduino_due_x_dbg.pid.0=0x003d
+arduino_due_x_dbg.vid.1=0x2A03
+arduino_due_x_dbg.pid.1=0x003d
+arduino_due_x_dbg.vid.0x2A03.warning=Uncertified
 arduino_due_x_dbg.upload.tool=bossac
 arduino_due_x_dbg.upload.protocol=sam-ba
 arduino_due_x_dbg.upload.maximum_size=524288
@@ -23,6 +26,9 @@ arduino_due_x_dbg.build.pid=0x003e
 arduino_due_x.name=Arduino Due (Native USB Port)
 arduino_due_x.vid.0=0x2341
 arduino_due_x.pid.0=0x003e
+arduino_due_x.vid.1=0x2A03
+arduino_due_x.pid.1=0x003e
+arduino_due_x.vid.0x2A03.warning=Uncertified
 arduino_due_x.upload.tool=bossac
 arduino_due_x.upload.protocol=sam-ba
 arduino_due_x.upload.maximum_size=524288