perl-digest-hmac: add license hash

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/perl-digest-hmac/perl-digest-hmac.hash

@@ -1,3 +1,6 @@
 # retrieved by scancpan from http://cpan.metacpan.org/
 md5    e6a5d6f552da16eacb5157ea4369ff9d Digest-HMAC-1.03.tar.gz
 sha256 3bc72c6d3ff144d73aefb90e9a78d33612d58cf1cd1631ecfb8985ba96da4a59 Digest-HMAC-1.03.tar.gz
+
+# computed by scancpan
+sha256 56bf7cdaec5eebf74d58679638ebef5015883e65c1be7251a3ef8cce8bdd1ff5 README