package/openpowerlink: fix sha256 hash

While bumping to v2.4.0, the sha256 was commented by mistake
and the hash was for v2.3.2 archive.

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/openpowerlink/openpowerlink.hash

@@ -2,4 +2,4 @@
 md5	a833ca76a162db04a28c36ccecfd8a05	openPOWERLINK_V2.4.0.tar.gz
 sha1	d2260f7d1b7f264dd7a0323509bec233d36aed11	openPOWERLINK_V2.4.0.tar.gz
 # sha256 locally computed
-#sha256	e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855	openPOWERLINK_V2.4.0.tar.gz
+sha256	7296556e621adfeeb643c6541747433ecf86176923d736ea909e9ff6dcf1650b	openPOWERLINK_V2.4.0.tar.gz