Properly handle volatile field accesses from JNI.
For uniprocessors, we need to use the 64-bit quasiatomic functions. For
SMP, we need to do that and also issue barriers on all operations.
This was mostly a matter of adding a bunch of inline getter/setter
functions and then calling the right one based on whether or not the
field is declared volatile.
Also, corrected the output for a failing CHECK_CLASS test in CheckJNI.
Bug
2890631.
(cherry-pick from dalvik-dev)
Change-Id: I3da3b70c906eddd5934347caea83ab041d22cd68