Say "(No permission to read directory contents)"

[積丹尼 Dan Jacobson]

Maybe instead of cryptic:
  /adb::/root:
  (No match)
  total used in directory 0 available 1.6 GiB

Say:
  /adb::/root:
  (No permission to read directory contents)
  total used in directory 0 available 1.6 GiB


In fact also:
  total used in directory: unknown, available 1.6 GiB

Anyway at least add a comma:
  total used in directory 0, available 1.6 GiB

tramp-version "2.5.0.2"