lzip: bump to version 1.18

Also, correct license.

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/lzip/lzip.hash

@@ -1,2 +1,4 @@
+# From http://lists.nongnu.org/archive/html/lzip-bug/2016-06/msg00002.html
+sha1	ef42f3209d02c3b3c217a61c8f127bcb8747b128	lzip-1.18.tar.gz
 # Locally calculated after checking pgp signature
-sha256	7cd3fcda68fc9900efcf7784313e3bdd1303fef1a0546db9723f5e5564dd05b6	lzip-1.15.tar.gz
+sha256	47f9882a104ab05532f467a7b8f4ddbb898fa2f1e8d9d468556d6c2d04db14dd	lzip-1.18.tar.gz

package/lzip/lzip.mk

@@ -4,9 +4,9 @@
 #
 ################################################################################
 
-LZIP_VERSION = 1.15
+LZIP_VERSION = 1.18
 LZIP_SITE = http://download.savannah.gnu.org/releases/lzip
-LZIP_LICENSE = GPLv3+
+LZIP_LICENSE = GPLv2+
 LZIP_LICENSE_FILES = COPYING
 
 define LZIP_CONFIGURE_CMDS