grammars: include recent lua grammar patches from TextMate.

* lib/zile/grammar/lua-bundle.lua: Apply upstream improvements;
mostly to fix comment blocks following only whitespace.
* lib/zz/default-color-bundle.lua (support.function.library)
(support.function.any-method, variable.language)
(variable.parameter): New color styles for new scopes.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>