RFR 8135332: ScriptFunction constructor should use is bound and is strict check rather than checking for 'arguments' and 'caller'

[Sundararajan Athijegannathan]

Please review http://cr.openjdk.java.net/~sundar/8135332/ for 
https://bugs.openjdk.java.net/browse/JDK-8135332

Thanks,
-Sundar