Do not wrap errors from filepath/os as they are already wrapped.
Do not wrap errors from filepath/os as they are already wrapped.

Since errors from filepath/ost are already wrapped, they
do not need to be wrapped again. Wrapping them again will
cause os.IsErrNotExist(err) to return false while some providers
may want it to be true.

Signed-off-by: Manu Gupta <7701982c33551c7239eb89e7f0ce284c42c1f0c9@gmail.com>

moby/sys