Review request for 8016550: nashorn.option.no.syntax.extensions has the wrong default

[A. Sundararajan]

Please review http://cr.openjdk.java.net/~sundar/8016550/

In addition to default change, I made the following changes:

* Removed --anon-functions/ -af option (covered already by 
--no-syntax-exceptions / -nse option)
* Made all short-names to have single "-" (--ccs -> -ccs, --nse -> -nse)
* Added --function-statement-error for test262 error - previously few 
negative tests were passing for the wrong reasons.

-Sundar