Fixed a bug where variables' byte sizes would not
respect their Clang types if the variables' values
were represented by DWARF constu values.

<rdar://problem/14636499>


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@192267 91177308-0d34-0410-b5e6-96231b3b80d8