Let mkdirhier fail if existing path is not a folder instead of assuming a
directory hierarchy already exists.
(Bitbake rev: a8d9b82ccf93dcb74258693f62d88be380b1c0b7)
Signed-off-by: Andre Rosa <andre.rosa@lge.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>