[JITLink] Use correct Addressable constructor.

Calling createAddressable(false) generates an absolute symbol. We want
createAddressable(0, false), which generates an external symbol.

Author: lhames

llvm/include/llvm/ExecutionEngine/JITLink/JITLink.h

@@ -963,7 +963,7 @@ class LinkGraph {
       Section &Sec = Sym.getBlock().getSection();
       Sec.removeSymbol(Sym);
     }
-    Sym.makeExternal(createAddressable(false));
+    Sym.makeExternal(createAddressable(0, false));
     ExternalSymbols.insert(&Sym);
   }