QT5检测USB设备

这份代码本来是网上找的，但是是在很老的Qt版本下的，在qt5平台下运行失败。我已经移植好了，可以直接运行。

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 属性            大小     日期    时间   名称
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     目录           0  2018-01-31 09:10  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\
     目录           0  2018-01-31 09:10  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\
     文件         109  2012-03-10 00:01  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.gitignore
     目录           0  2018-01-31 09:10  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.moc\
     目录           0  2018-01-31 09:10  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.moc\5.8.0\
     文件        4147  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.moc\5.8.0\moc_hotplugwatcher.cpp
     文件        4877  2018-01-27 19:18  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.moc\5.8.0\moc_hotplugwatcher_gui.cpp
     文件        9895  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.moc\5.8.0\moc_predefs.h
     文件        5735  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.moc\5.8.0\moc_qdevicewatcher.cpp
     文件        3666  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.moc\5.8.0\moc_qdevicewatcher_p.cpp
     目录           0  2018-01-31 09:10  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\
     目录           0  2018-01-31 09:10  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\
     文件       13396  2018-01-30 20:50  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\hotplugwatcher_gui.obj
     文件        4484  2018-01-27 17:32  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\main.obj
     文件        2804  2018-01-30 19:41  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\main_gui.obj
     文件       11324  2018-01-30 19:41  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\moc_hotplugwatcher.obj
     文件        7512  2018-01-30 19:41  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\moc_hotplugwatcher_gui.obj
     文件        4420  2018-01-30 19:40  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\moc_qdevicewatcher.obj
     文件        3536  2018-01-30 19:40  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\moc_qdevicewatcher_p.obj
     文件        4508  2018-01-27 17:32  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\qdevicechangeevent.obj
     文件        6520  2018-01-30 20:50  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\qdevicewatcher.obj
     文件       11964  2018-01-30 20:50  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_linux_arm\qdevicewatcher_linux.obj
     目录           0  2018-01-31 09:10  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\
     文件         772  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\QDeviceWatcherd_resource_res.o
     文件      358764  2018-01-30 20:30  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\hotplugwatcher_gui.o
     文件      295373  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\main.o
     文件      504545  2018-01-27 19:18  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\main_gui.o
     文件      356907  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\moc_hotplugwatcher.o
     文件      419591  2018-01-27 19:18  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\moc_hotplugwatcher_gui.o
     文件      316274  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\moc_qdevicewatcher.o
     文件      323974  2018-01-27 18:14  wang-bin-qdevicewatcher-2018.1.30-2052编译成功\wang-bin-qdevicewatcher-d8785a2\.obj\_win32\moc_qdevicewatcher_p.o
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