This is just a safe check to make sure the output folder is present, before
creating the files-in-$pkg.txt file.
(From OE-Core rev: d48233cb1fd84f1061a8ba3c15bacc180e93934c)
Signed-off-by: Leonardo Sandoval <leonardo.sandoval.gonzalez@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>