console: wrap in a Proxy object
console: wrap in a Proxy object

Ensures any undefined console method calls are ignored silently.
This is required specifically by the DeveloperToolsWG proposal
(and is implemented also by Firefox:
https://bugzilla.mozilla.org/show_bug.cgi?id=629607).

Adapted from:
https://github.com/svaarala/duktape/blob/master/extras/console/duk_console.c

saghul/sjs,saghul/sjs,saghul/sjs,saghul/sjs