Relax the expected output so that the tests become robust against llvm-objdump format change.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@199421 91177308-0d34-0410-b5e6-96231b3b80d8
[PECOFF] Tests for DLL name in the export table.

git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@199428 91177308-0d34-0410-b5e6-96231b3b80d8