meta-google: libconfig-perl: update license

Per [1], upstream removed the generic "BSD" license.  The libconfig-perl
package doesn't have an explicit LICENSE or COPYING file but instead has
a single line in the readme that states the license is "bsd".
Considering the OE commit says that the license-formally-just-BSD is
more formally BSD-3-Clause, update this recipe as such.

1. https://git.openembedded.org/openembedded-core/commit/?id=14d4c007c49652d836d325a12bdbcd3bfa42e6d5

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ifb47c08571e6297f643db5daf135349bc0fbf888
diff --git a/meta-google/recipes-extended/libconfig/libconfig-perl_0.100.bb b/meta-google/recipes-extended/libconfig/libconfig-perl_0.100.bb
index 2f4656d..8cdf9f7 100644
--- a/meta-google/recipes-extended/libconfig/libconfig-perl_0.100.bb
+++ b/meta-google/recipes-extended/libconfig/libconfig-perl_0.100.bb
@@ -1,5 +1,5 @@
 HOMEPAGE = "https://metacpan.org/pod/Conf::Libconfig"
-LICENSE = "BSD"
+LICENSE = "BSD-3-Clause"
 LIC_FILES_CHKSUM = "file://${COREBASE}/meta/files/common-licenses/BSD;md5=3775480a712fc46a69647678acb234cb"
 
 SRC_URI = "https://cpan.metacpan.org/authors/id/C/CN/CNANGEL/Conf-Libconfig-${PV}.tar.gz"