iucode-tool: bump to version 2.3.1

Brings several fixes and enhancements. Check the change log at

    https://gitlab.com/iucode-tool/iucode-tool/raw/v2.3.1/ChangeLog

Tested on an equipment with Intel C3000 processor.

Signed-off-by: Carlos Santos <casantos@datacom.com.br>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/iucode-tool/iucode-tool.hash

@@ -1,3 +1,3 @@
 # Locally computed
-sha256 9810daf925b8a9ca244adc4e1916bcab65601c9ebe87e91c2281f78055982971  iucode-tool_2.2.tar.xz
+sha256 12b88efa4d0d95af08db05a50b3dcb217c0eb2bfc67b483779e33d498ddb2f95  iucode-tool_2.3.1.tar.xz
 sha256 ab15fd526bd8dd18a9e77ebc139656bf4d33e97fc7238cd11bf60e2b9b8666c6  COPYING

package/iucode-tool/iucode-tool.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-IUCODE_TOOL_VERSION = 2.2
+IUCODE_TOOL_VERSION = 2.3.1
 IUCODE_TOOL_SOURCE = iucode-tool_$(IUCODE_TOOL_VERSION).tar.xz
 IUCODE_TOOL_SITE = https://gitlab.com/iucode-tool/releases/raw/master
 ifeq ($(BR2_PACKAGE_ARGP_STANDALONE),y)