Add vendored Binutils and GCC

.gitignore

@@ -54,3 +54,13 @@
 /tests/test_pfa_assert
 /tests/test_printf
 /tests/test_units_human
+
+/vendor/*
+!/vendor/cross/
+!/vendor/fetch.sh
+!/vendor/limine/
+!/vendor/sha256sums.txt
+!/vendor/wget.txt
+
+/vendor/cross/*
+!/vendor/cross/.keep

vendor/fetch.sh

@@ -0,0 +1,9 @@
+#!/bin/sh
+
+set -e
+
+wget -nc -i 'vendor/wget.txt' -P 'vendor'
+sha256sum -c 'vendor/sha256sums.txt'
+
+tar -xf 'vendor/binutils-2.37.tar.xz' -C 'vendor'
+tar -xf 'vendor/gcc-11.2.0.tar.xz'    -C 'vendor'

vendor/sha256sums.txt

@@ -0,0 +1,2 @@
+820d9724f020a3e69cb337893a0b63c2db161dadcb0e06fc11dc29eb1e84a32c  vendor/binutils-2.37.tar.xz
+d08edc536b54c372a1010ff6619dd274c0f1603aa49212ba20f7aa2cda36fa8b  vendor/gcc-11.2.0.tar.xz

vendor/wget.txt

@@ -0,0 +1,2 @@
+https://ftp.gnu.org/gnu/binutils/binutils-2.37.tar.xz
+https://ftp.gnu.org/gnu/gcc/gcc-11.2.0/gcc-11.2.0.tar.xz