Fix misc phan errors by adjusting documentation (#8)

Fix misc phan errors by adjusting documentation (#8)

PhanTypeInvalidRightOperand was triggering on
ApiQueryBase::showHiddenUsersAddBlockInfo() on the line
`$actorQuery['tables'] + $commentQuery['tables']` (and the next one).
For whatever reason, phan was unable to automatically understand that
the right side was an array (though it was able to understand
$actorQuery, which has nearly identical code...), so I added more
specific hinting to CommentStore::getJoin() using phan's union types,
which resolved the issue.

And incorrect documentation on LogEntry::getDeleted() was triggering
PhanTypeMismatchBitwiseBinaryOperands since you can't do bitwise
operations on a string and an integer.

Change-Id: I13b791e4b754ffbc340b55cfb752e2d9226f1949