Review request(7u): Backport of bugs 8031290 and 8019324

[Poonam Bajaj]

Hi,

Please review these changes that backport the fixes of 8031290 and 
8019324 to 7u.

Bugs:
JDK-8031290: <https://bugs.openjdk.java.net/browse/JDK-8031290> Adjust 
call to getisax() for additional words returned
JDK-8019324: <https://bugs.openjdk.java.net/browse/JDK-8019324> 
assert(_f2 == 0 || _f2 == f2) failed: illegal field change

Webrev: http://cr.openjdk.java.net/~poonam/8031290_8019324/webrev.00/

The first one is a direct backport and for the second fix methodOop had 
to be used in place of Method*.

Thanks,
Poonam