package/upx: security bump to version 3.96

- Switch site to github to get latest release
- Fix CVE-2019-20805: p_lx_elf.cpp in UPX before 3.96 has an integer
  overflow during unpacking via crafted values in a PT_DYNAMIC segment.
- Fix CERT-FI Case 829767 UPX command line tools segfaults.

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 0f57837f6a1c31fd986fea1a86802ce6bc33d5f6)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/upx/upx.hash

@@ -1,3 +1,3 @@
 # Locally computed:
-sha256  527ce757429841f51675352b1f9f6fc8ad97b18002080d7bf8672c466d8c6a3c  upx-3.91-src.tar.bz2
+sha256  47774df5c958f2868ef550fb258b97c73272cb1f44fe776b798e393465993714  upx-3.96-src.tar.xz
 sha256  8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  COPYING

package/upx/upx.mk

@@ -4,9 +4,9 @@
 #
 ################################################################################
 
-UPX_VERSION = 3.91
-UPX_SITE = http://upx.sourceforge.net/download
-UPX_SOURCE = upx-$(UPX_VERSION)-src.tar.bz2
+UPX_VERSION = 3.96
+UPX_SITE = https://github.com/upx/upx/releases/download/v$(UPX_VERSION)
+UPX_SOURCE = upx-$(UPX_VERSION)-src.tar.xz
 UPX_LICENSE = GPL-2.0+
 UPX_LICENSE_FILES = COPYING