Fix try_drag_and_drop_flash

Wrong parameters were used.

Author: Juho Hovila

mbed_flasher/flashers/FlasherMbed.py

@@ -170,7 +170,7 @@ def try_drag_and_drop_flash(self, source, target, target_filename, no_reset):
             self.copy_file(source, destination)
             self.logger.debug("copy finished")
 
-            target = MbedCommon.wait_for_file_disappear(target, source)
+            target = MbedCommon.wait_for_file_disappear(target, target_filename)
 
             if not no_reset:
                 Reset(logger=self.logger).reset_board(target["serial_port"])
@@ -179,7 +179,7 @@ def try_drag_and_drop_flash(self, source, target, target_filename, no_reset):
             # verify flashing went as planned
             self.logger.debug("verifying flash")
             return self.verify_flash_success(
-                target, MbedCommon.get_binary_destination(target["mount_point"], source))
+                target, MbedCommon.get_binary_destination(target["mount_point"], target_filename))
         # In python3 IOError is just an alias for OSError
         except (OSError, IOError) as error:
             msg = "File copy failed due to: {}".format(str(error))