nettle: Fix PKG_LICENSE_FILES

Update file names.

Signed-off-by: Jan Kardell <[email protected]>
Link: https://patchwork.ozlabs.org/project/openwrt/patch/[email protected]/
Signed-off-by: Hauke Mehrtens <[email protected]>

package/libs/nettle/Makefile

@@ -17,7 +17,9 @@ PKG_SOURCE_URL:=@GNU/nettle
 PKG_HASH:=b0fcdd7fc0cdea6e80dcf1dd85ba794af0d5b4a57e26397eee3bc193272d9132
 
 PKG_LICENSE:=GPL-2.0-or-later
-PKG_LICENSE_FILES:=COPYING
+PKG_LICENSE_FILES:=	COPYING.LESSERv3 \
+			COPYINGv2 \
+			COPYINGv3
 PKG_CPE_ID:=cpe:/a:nettle_project:nettle
 PKG_BUILD_PARALLEL:=1