libarchive: security bump to version 3.2.1

Fixes:
CVE-2016-4302 - Libarchive Rar RestartModel Code Execution Vulnerability
CVE-2016-4300 - Libarchive 7zip read_SubStreamsInfo Code Execution
Vulnerability
CVE-2016-4809 - Memory allocate error in corrupted cpio archives

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libarchive/libarchive.hash

@@ -1,2 +1,2 @@
 # Locally computed:
-sha256  7bce45fd71ff01dc20d19edd78322d4965583d81b8bed8e26cacb65d6f5baa87  libarchive-3.2.0.tar.gz
+sha256  72ee1a4e3fd534525f13a0ba1aa7b05b203d186e0c6072a8a4738649d0b3cfd2  libarchive-3.2.1.tar.gz

package/libarchive/libarchive.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBARCHIVE_VERSION = 3.2.0
+LIBARCHIVE_VERSION = 3.2.1
 LIBARCHIVE_SITE = http://www.libarchive.org/downloads
 LIBARCHIVE_INSTALL_STAGING = YES
 LIBARCHIVE_LICENSE = BSD-2c, BSD-3c