Relaced the key with the join between path and file name.
[YOCTO #6090]
(From OE-Core rev: 85ffc93becb31772107a5a63b09fd3c16160f3ca)
Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>