perl-xml-libxml: add license hash

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

package/perl-xml-libxml/perl-xml-libxml.hash

@@ -1,3 +1,6 @@
 # retrieved by scancpan from http://cpan.metacpan.org/
 md5    43546fd9a3974f19323f9fb04861ece9 XML-LibXML-2.0132.tar.gz
 sha256 721452e3103ca188f5968ab06d5ba29fe8e00e49f4767790882095050312d476 XML-LibXML-2.0132.tar.gz
+
+# computed by scancpan
+sha256 5046a7ec515cc1542beafdf2eadeeff24cc221fc3fde9913dd144fd263ae6100 LICENSE