Add support for archives and object file caching under MCJIT.

Patch by Andy Kaylor, with minor edits to resolve merge conflicts.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196639 91177308-0d34-0410-b5e6-96231b3b80d8

lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.h

@@ -94,6 +94,7 @@ public:
                                     const SymbolTableMap &Symbols,
                                     StubMap &Stubs);
   virtual bool isCompatibleFormat(const ObjectBuffer *Buffer) const;
+  virtual bool isCompatibleFile(const object::ObjectFile *Obj) const;
   virtual void registerEHFrames();
   virtual void finalizeLoad(ObjSectionToIDMap &SectionMap);
 };