readme: setup github pages to overcome 512k limit

publish-gh-pages

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+# https://github.com/cirosantilli/linux-kernel-module-cheat#github-pages
+set -eu
+git push
+./build-doc --github-pages
+git branch -D gh-pages
+git checkout --orphan gh-pages
+git reset
+cp out/README.html index.html
+git add _config.yml index.html
+git commit --message "$(git log -n1 --pretty='%H' master)"
+git push --force
+git symbolic-ref HEAD refs/heads/master
+git reset
+rm index.html