Add some notes about some tests that would be nice to have
Add some notes about some tests that would be nice to have

Unfortunately, I don't know how to trick the compiler into generating
them (though it seems to be possible in the wild).  These are constructs
that exposed problems in the SSA transformation that are now fixed.
Additionally, these problems fail noisily, so regressions will at least
be noticeable.

travitch/dalvik,travitch/dalvik