Revert "Fix a nomenclature error in llvm-nm."

This reverts commit r205479.

It turns out that nm does use addresses, it is just that every reasonable
relocatable ELF object has sections with address 0. I have no idea if those
exist in reality, but it at least it shows that llvm-nm should use the name
address.

The added test was includes an unusual .o file with non 0 section addresses. I
created it by hacking ELFObjectWriter.cpp.

Really sorry for the churn.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205493 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Object/ELFObjectFile.h

@@ -417,15 +417,7 @@ template <class ELFT>
 error_code ELFObjectFile<ELFT>::getSymbolValue(DataRefImpl Symb,
                                                uint64_t &Val) const {
   const Elf_Sym *ESym = getSymbol(Symb);
-  switch (EF.getSymbolTableIndex(ESym)) {
-  default:
-    Val = ESym->st_value;
-    break;
-  case ELF::SHN_COMMON:
-  case ELF::SHN_UNDEF:
-    Val = UnknownAddressOrSize;
-    break;
-  }
+  Val = ESym->st_value;
   return object_error::success;
 }