bisection: update section, add gem5 linux boot bisect script

bisect-gem5-linux-boot

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+# https://github.com/cirosantilli/linux-kernel-module-cheat#bisection
+set -eu
+cd ../..
+./build-gem5 --gem5-build-id bisect
+set +e
+# Setup for quick failures:
+# https://stackoverflow.com/questions/4713088/how-to-use-git-bisect/22592593#22592593
+timeout 5 ./run --emulator gem5 --gem5-build-id bisect --quit-after-boot
+if [ $? -ne 124 ]; then
+  exit 1
+fi