RFR: JDK-8165493: SA: Add method in GrowableArray.java to be able to access the 'data' field

[Poonam Bajaj Parhar]

Hello,

Please review this small change that adds an accessor method to 
GrowableArray class for its 'data' field.

Bug: https://bugs.openjdk.java.net/browse/JDK-8165493
Webrev: http://cr.openjdk.java.net/~poonam/8165493/webrev/

This change is required for closed flight recorder related changes on 
the SA side.

Thanks,
Poonam