objdump: Add test for ELF file with no section table

This is a test for the fix in r211904.

Differential Revision: http://reviews.llvm.org/D4349


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212059 91177308-0d34-0410-b5e6-96231b3b80d8