[llvm-nm] - Add a test case for case when we dump a symbol that belongs to a section...

[llvm-nm] - Add a test case for case when we dump a symbol that belongs to a section with a broken sh_name.

It adds a test case for a problem fixed by D66976.

It was introduced by me in D66089.
The error reported was never consumed because of a wrong variable name used,
so it could fail when LLVM_ENABLE_ABI_BREAKING_CHECKS is used.

Differential revision: https://reviews.llvm.org/D67002

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@370661 91177308-0d34-0410-b5e6-96231b3b80d8