New Grammars Compiler (#3915)

* grammars: Update several grammars with compat issues

* [WIP] Add new grammar conversion tools

* Wrap in a Docker script

* Proper Dockerfile support

* Add Javadoc grammar

* Remove NPM package.json

* Remove superfluous test

This is now always checked by the grammars compiler

* Update JSyntax grammar to new submodule

* Approve Javadoc license

* grammars: Remove checked-in dependencies

* grammars: Add regex checks to the compiler

* grammars: Point Oz to its actual submodule

* grammars: Refactor compiler to group errors by repo

* grammars: Cleanups to error reporting

tools/grammars/docker/build

@@ -0,0 +1,11 @@
+#!/bin/sh
+
+set -ex
+cd "$(dirname "$0")/.."
+
+image=linguist/grammar-compiler
+docker build -t $image .
+
+if [ "$1" = "--push" ]; then
+    docker push $image
+fi