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

lib/Object/MachOObjectFile.cpp

@@ -633,8 +633,7 @@ MachOObjectFile::getSymbolSection(DataRefImpl Symb,
 
 error_code MachOObjectFile::getSymbolValue(DataRefImpl Symb,
                                            uint64_t &Val) const {
-  // In MachO both relocatable and non-relocatable objects have addresses.
-  return getSymbolAddress(Symb, Val);
+  report_fatal_error("getSymbolValue unimplemented in MachOObjectFile");
 }
 
 void MachOObjectFile::moveSectionNext(DataRefImpl &Sec) const {