package/leptonica: fix legal info

Commit 5159f656608cb1a136c0fed8372ffe8ec3a75b33 forgot to update hash of
leptonica-license.txt which changed due to an update in year:
https://github.com/DanBloomberg/leptonica/commit/8193d341dd56aff5fcbbaab8832e7b38f2fede0a

Fixes:
 - http://autobuild.buildroot.org/results/1644512ca52eed1b69d65d3ca145ec0d253888a8

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/leptonica/leptonica.hash

@@ -1,3 +1,3 @@
 # locally computed hash
 sha256  ec9c46c2aefbb960fb6a6b7f800fe39de48343437b6ce08e30a8d9688ed14ba4  leptonica-1.80.0.tar.gz
-sha256  ca0ac11c7c0acad9599d54990942cc11c9f6d9b569f1a360d774a628819c3518  leptonica-license.txt
+sha256  87829abb5bbb00b55a107365da89e9a33f86c4250169e5a1e5588505be7d5806  leptonica-license.txt