Make zero compile after 8016131 and 8016697

[Omair Majid]

Hi,

The following webrev makes zero compile again:
http://cr.openjdk.java.net/~omajid/webrevs/zero-build-broken/00/

The changes in the werbrev mirror the changes made in the following
changesets:

changeset:   4983:e619a2766bcc
user:        rbackman
date:        Wed Jun 12 11:17:39 2013 +0200
summary:     8016131: nsk/sysdict/vm/stress/chain tests crash the VM in
'entry_frame_is_first()'

changeset:   4961:980532a806a5
user:        goetz
date:        Thu Jun 20 15:02:05 2013 +0200
summary:     8016697: Use stubs to implement safefetch

I am not sure what the best tree to use is. I made the webrev against
hsx/hotspot-rt, but it applies to hsx/hotspot-main without any changes too.

Any concerns with the patch?

Thanks,
Omair
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