Replace ObjRelocationInfo with relocation_iterator.

For MachO we need information that is not represented in ObjRelocationInfo.
Instead of copying the bits we think are needed from a relocation_iterator,
just pass the relocation_iterator down to the format specific functions.

No functionality change yet as we still drop the information once
processRelocationRef returns.

llvm-svn: 180711
diff --git a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
index f581b3f..8f1658c 100644
--- a/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
+++ b/llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h
@@ -48,7 +48,8 @@
                             unsigned Size,
                             int64_t Addend);
 
-  virtual void processRelocationRef(const ObjRelocationInfo &Rel,
+  virtual void processRelocationRef(unsigned SectionID,
+                                    relocation_iterator RelI,
                                     ObjectImage &Obj,
                                     ObjSectionToIDMap &ObjSectionToID,
                                     const SymbolTableMap &Symbols,