Update to GCC 13

The latest version of GCC.

Luckily this allows for a bunch of patches to be dropped - apart from
that, no significant change.

sysc/gcc-12.2.0/patches/fix-gcc-autoreconf.patch

@@ -1,43 +0,0 @@
-SPDX-FileCopyrightText: 2023 fosslinux <fosslinux@aussies.space>
-SPDX-FileCopyrightText: 2022 Thomas Schwinge <thomas@codesourcery.com>  
-
-SPDX-License-Identifier: GPL-3.0-or-later
-
-Backport of commit 25861cf3a88a07c8dca3fb32d098c0ad756bbe38
-
-====
-With that, we may then run plain 'autoreconf' for all of GCC's subpackages,
-instead of for some of those (that don't use Automake) manually having to run
-the applicable combination of 'aclocal', 'autoconf', 'autoheader'.
-
-See also 'AC_CONFIG_MACRO_DIRS'/'AC_CONFIG_MACRO_DIR' usage elsewhere.
-
-diff --git gcc/configure.ac gcc/configure.ac
-index e1ef2ecf026..45bf7560e6f 100644
---- gcc/configure.ac
-+++ gcc/configure.ac
-@@ -25,6 +25,7 @@
- 
- AC_INIT
- AC_CONFIG_SRCDIR(tree.cc)
-+AC_CONFIG_MACRO_DIRS([../config] [..])
- AC_CONFIG_HEADER(auto-host.h:config.in)
- 
- gcc_version=`cat $srcdir/BASE-VER`
-diff --git libobjc/configure libobjc/configure
-index a8fdc643349..6da20b8e4ff 100755
-diff --git libobjc/configure.ac libobjc/configure.ac
-index f8f577cfbef..6f58a45d4cb 100644
---- libobjc/configure.ac
-+++ libobjc/configure.ac
-@@ -20,6 +20,7 @@
- 
- AC_INIT(package-unused, version-unused,, libobjc)
- AC_CONFIG_SRCDIR([objc/objc.h])
-+AC_CONFIG_MACRO_DIRS([../config] [..])
- GCC_TOPLEV_SUBDIRS
- 
- # We need the following definitions because AC_PROG_LIBTOOL relies on them
--- 
-2.31.1
-

sysc/gcc-12.2.0/patches/fix-libiberty-autoreconf.patch

@@ -1,34 +0,0 @@
-SPDX-FileCopyrightText: 2023 fosslinux <fosslinux@aussies.space>
-SPDX-FileCopyrightText: 2022 Simon Marchi <simon.marchi@efficios.com>
-
-SPDX-License-Identifier: GPL-3.0-or-later
-
-Backport of commit 1f237573caa5cf72218ea31fe78eb3983a717ca6
-
-====
-
-Add
-
-  AC_CONFIG_MACRO_DIRS([../config])
-
-So that just running:
-
-  $ autoreconf -vf
-
-... does the right thing (no need to specify -I ../config).
-
-diff --git libiberty/configure.ac libiberty/configure.ac
-index 84a7b378fad..28d996f9cf7 100644
---- libiberty/configure.ac
-+++ libiberty/configure.ac
-@@ -2,6 +2,7 @@ dnl Process this file with autoconf to produce a configure script
- 
- AC_INIT
- AC_CONFIG_SRCDIR([xmalloc.c])
-+AC_CONFIG_MACRO_DIRS([../config])
- 
- # This works around the fact that libtool configuration may change LD
- # for this particular configuration, but some shells, instead of
--- 
-2.31.1
-

sysc/gcc-12.2.0/sources

@@ -1 +0,0 @@
-http://ftp.gnu.org/gnu/gcc/gcc-12.2.0/gcc-12.2.0.tar.xz e549cf9cf3594a00e27b6589d4322d70e0720cdd213f39beb4181e06926230ff

sysc/gcc-13.1.0/sources

@@ -0,0 +1 @@
+https://ftp.gnu.org/gnu/gcc/gcc-13.1.0/gcc-13.1.0.tar.xz 61d684f0aa5e76ac6585ad8898a2427aade8979ed5e7f85492286c4dfc13ee86

sysc/run2.sh

@@ -124,7 +124,7 @@ build gcc-10.4.0
 
 build binutils-2.38 pass2.sh
 
-build gcc-12.2.0
+build gcc-13.1.0
 
 if [ "$FORCE_TIMESTAMPS" = True ] ; then
     echo 'Forcing all files timestamps to be 0 unix time.'