Review request for JDK-8073868: Regex matching causes java.lang.ArrayIndexOutOfBoundsException: 64

[Hannes Wallnoefer]

Please review JDK-8073868: Regex matching causes 
java.lang.ArrayIndexOutOfBoundsException: 64:

http://cr.openjdk.java.net/~hannesw/8073868/
This is different from the fix in JRuby Joni since ECMAScript seems to 
require different semantics from Ruby.

The patch also removes methods for features that are not used in JavaScript.

Thanks,
Hannes