package/dt: add license hash

While at it, drop the "Calculated based on the hash above" comment,
which doesn't make any sense: you don't calculate a hash based on
another hash.

Signed-off-by: Matthew Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/dt/dt.hash

@@ -1,5 +1,7 @@
 # From http://pkgs.fedoraproject.org/repo/pkgs/dt/dt-source-v18.32.tar.gz
 # (directory name is md5 hash)
 md5	3054aeaaba047a1dbe90c2132a382ee2	dt-source-v18.32.tar.gz
-# Calculated based on the hash above
+
+# Locally calculated
 sha256	10d164676e918a4d07f233bcd11e4cb6bfd1052c996182cd1827ccd0c063fcc6	dt-source-v18.32.tar.gz
+sha256  49f47f20de4b44dc3505ed0cc55bfbfe0fc3e41956ab546f1eeedcf554def54c	LICENSE