Merge branch 'dfu-util2' of github.com:jgillick/Arduino_Core_STM32 into dfu-util2

Author: jgillick

platform.txt

@@ -220,4 +220,4 @@ tools.dfu_util.path.macosx={runtime.tools.STM32Tools.path}/tools/macosx/dfu-util
 tools.dfu_util.path.linux={runtime.tools.STM32Tools.path}/tools/linux
 tools.dfu_util.upload.params.verbose=-v
 tools.dfu_util.upload.params.quiet=
-tools.dfu_util.upload.pattern="{path}/{cmd}" --device {upload.usbID} -a 0 --dfuse-address {upload.address}:leave -D "{build.path}/{build.project_name}.bin"
+tools.dfu_util.upload.pattern="{path}/{cmd}" --device {upload.usbID} -a 0 --dfuse-address {upload.address} -D "{build.path}/{build.project_name}.bin"