* module/Makefile.am (ECMASCRIPT_LANG_SOURCES):
* module/language/ecmascript/compile-ghil.scm:
* module/language/ecmascript/compile-tree-il.scm: SOURCES): Replace the
GHIL compiler with a ->tree-il compiler. Not fully functional, but the
basics work.
* module/language/ecmascript/spec.scm: Only include the tree-il compiler.
* module/language/ecmascript/tokenize.scm (read-punctuation): Avoid
mutating a constant.
