Made the IRInterpreter be able to operate without
a ClangExpressionDeclMap.  Any functions that
require value resolution etc. fail if the
ClangExpressionDeclMap isn't present - which is
exactly what is desired.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@179695 91177308-0d34-0410-b5e6-96231b3b80d8