llvm-readobj: Add test for COFF auxiliary symbols as used by C++/CLI

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204023 91177308-0d34-0410-b5e6-96231b3b80d8
llvm-readobj: Print referred symbol name for CLR token definition

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204024 91177308-0d34-0410-b5e6-96231b3b80d8