Provide console.log and console.error

c/jsc-test.c

	register_global_function(ctx, "CONSOLE_LOG", console_log);
	register_global_function(ctx, "CONSOLE_ERROR", console_error);
	JSStringRef init_source = JSStringCreateWithUTF8CString("<init>");
	JSStringRef init_script = JSStringCreateWithUTF8CString("var console = {};"\
			"console.log = CONSOLE_LOG;"\
			"console.error = CONSOLE_ERROR;");
	JSEvaluateScript(ctx, init_script, NULL, init_source, 0, NULL);
	JSStringRef source = JSStringCreateWithUTF8CString("<inline>");
	JSStringRef script;
	if (argc == 0) {