am 85b3fcc5: system/core: vold: Change permission of external storage device nodes

Merge commit '85b3fcc5de004999756c1e90bcf845480217b3f6' into eclair

* commit '85b3fcc5de004999756c1e90bcf845480217b3f6':
  system/core: vold: Change permission of external storage device nodes