Adding support for deregistering EH frames with MCJIT.

Patch by Yaron Keren



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192753 91177308-0d34-0410-b5e6-96231b3b80d8

lib/ExecutionEngine/RuntimeDyld/RuntimeDyldImpl.h

@@ -342,6 +342,8 @@ public:
 
   virtual void registerEHFrames();
 
+  virtual void deregisterEHFrames();
+
   virtual void finalizeLoad(ObjSectionToIDMap &SectionMap) {}
 };