Path of rpm post install script is different between rpm 4 and 5
(From OE-Core rev: a880669f767532ce3c39eb160fa9deb9fce29677)
Signed-off-by: Jean-Benoit MARTIN <jean-benoit.martin@open.eurogiciel.org>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>