Temporary fix for bad LIR generation in GenInlinedGet.

In GenInlinedGet we will sometimes try to load a class directly. If
we are doing that and find one, but cannot get the direct pointer
(due to image compilation or including patch information) we might
end up generating incorrect patching code due to the changing of the
cu_->dex_file attribute.

Bug: 16656190
Change-Id: I9bada598bf4fd972d6164163eedd4a496da306d6