am d6391c6a: merge from open-source master

Merge commit 'd6391c6a'

* commit 'd6391c6a':
  ADB: Garmin-Asus's USB Vendor ID
  adb: add Nvidia's vendor id to adb
  make "adb bugreport" run "bugreport" (which invokes "dumpstate"
  adb: Fix problems detecting adb in more complicated USB configurations.
  Make adb pull use . as the target file directory if you don't supply one.