Change the linker_private_weak_def_auto' linkage to linkonce_odr_auto_hide' to

make it more consistent with its intended semantics.

The `linker_private_weak_def_auto' linkage type was meant to automatically hide
globals which never had their addresses taken. It has nothing to do with the
`linker_private' linkage type, which outputs the symbols with a `l' (ell) prefix
among other things.

The intended semantic is more like the `linkonce_odr' linkage type.

Change the name of the linkage type to `linkonce_odr_auto_hide'. And therefore
changing the semantics so that it produces the correct output for the linker.

Note: The old linkage name `linker_private_weak_def_auto' will still parse but
is not a synonym for `linkonce_odr_auto_hide'. This should be removed in 4.0.
<rdar://problem/11754934>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162114 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-nm/llvm-nm.cpp

@@ -256,7 +256,6 @@ static void DumpSymbolNameForGlobalValue(GlobalValue &GV) {
   if (GV.hasPrivateLinkage() ||
       GV.hasLinkerPrivateLinkage() ||
       GV.hasLinkerPrivateWeakLinkage() ||
-      GV.hasLinkerPrivateWeakDefAutoLinkage() ||
       GV.hasAvailableExternallyLinkage())
     return;
   char TypeChar = TypeCharForSymbol(GV);