Rename AllocationSiteInfo to AllocationMemento

Rename AllocationSiteInfo to AllocationMemento

This is just a rename change with the exception of a bug found along the way in
CodeStubGraphBuilder<FastCloneShallowArrayStub>::BuildCodeStub(). There, the
intent is to get the boilerplate object from an AllocationSite. But the wrong
HObjectAccess was used. It only succeeds because it happened to be the same
offset :).

BUG=
R=bmeurer@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=15778

[mvstanton, 2013-07-19 13:09:31]

Hi Benedikt,
Would you have a look at this rename change? It's been on the list a while,
finally got to it :).
Thanks,
--Michael

[Benedikt Meurer, 2013-07-19 13:29:24]

LGTM
:-)

[mvstanton, 2013-07-19 13:31:04]

Committed patchset #1 manually as r15778 (presubmit successful).