RFR: JDK-8074459 - Flags handling memory sizes should be of type size_t

[Jesper Wilhelmsson]

Hi,

Please review this change to make most flags handling memory sizes to be of type 
size_t. Flags dealing with code heap and code cache are not included in this 
change. Se the bug for details.

The change is surprisingly small considering the amount of flags changed. Most 
variables around these flags was already of type size_t so there are only a few 
places where related code had to change in some way.

Bug: https://bugs.openjdk.java.net/browse/JDK-8074459
Webrev: http://cr.openjdk.java.net/~jwilhelm/8074459/webrev.01/

Testing: jprt, jtreg tests

Thanks,
/Jesper