Emit a warning diagnostic if a symbol was promoted
to a variable.  This helps people figure out what
happened if they tried to do something to the variable
and it didn't work because we gave it the default type
of void*.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@201737 91177308-0d34-0410-b5e6-96231b3b80d8