Port Rust-g DLL and use it for logging (#5394)

scripts/rust_g.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+if [ -f $HOME/rust_g-$RUST_G_VERSION/rust_g ]; then
+    echo "rust_g already cached."
+    exit 0
+fi
+
+set -e
+
+curl https://sh.rustup.rs -sSf | sh -s -- -y --default-host i686-unknown-linux-gnu
+
+source ~/.profile
+git clone --branch $RUST_G_VERSION https://github.com/tgstation/rust-g
+
+cd rust-g
+cargo build --release
+
+mkdir -p ~/.byond/bin
+cp $PWD/target/release/librust_g.so $HOME/rust_g-$RUST_G_VERSION/rust_g