Change Class layout to allocate an array of StaticField objects
immediately after the ClassObject, rather than use calloc.

This has the rather surprising and pleasing effect of increasing
charing about 150K per zygote-launced application, as measured at
start-up, after waiting and no-touching.

Change-Id: I6a6c9079f946eb99111326ed45f13ecfe544e4bb
8 files changed