Merge "fastboot: gracefully handle failure to open a USB device on OS X." am:...
Merge "fastboot: gracefully handle failure to open a USB device on OS X." am: 11be3e54 am: 9a1e060d am: 4a84cce5
am: 3cf521b1
Change-Id: I48fb419c148bdc111552d89515cc4e098c75466d