sqlite: add license info

Signed-off-by: Danomi Manchego <danomimanchego123@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/sqlite/sqlite.mk

@@ -7,6 +7,7 @@
 SQLITE_VERSION = 3071300
 SQLITE_SOURCE = sqlite-autoconf-$(SQLITE_VERSION).tar.gz
 SQLITE_SITE = http://www.sqlite.org
+SQLITE_LICENSE = Public domain
 SQLITE_INSTALL_STAGING = YES
 
 ifneq ($(BR2_LARGEFILE),y)