Move the personality function from LandingPadInst to Function

The personality routine currently lives in the LandingPadInst.

This isn't desirable because:
- All LandingPadInsts in the same function must have the same
  personality routine.  This means that each LandingPadInst beyond the
  first has an operand which produces no additional information.

- There is ongoing work to introduce EH IR constructs other than
  LandingPadInst.  Moving the personality routine off of any one
  particular Instruction and onto the parent function seems a lot better
  than have N different places a personality function can sneak onto an
  exceptional function.

Differential Revision: http://reviews.llvm.org/D10429

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239940 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/LibCallSemantics.h

@@ -206,7 +206,7 @@ class InvokeInst;
     llvm_unreachable("invalid enum");
   }
 
-  bool canSimplifyInvokeNoUnwind(const InvokeInst *II);
+  bool canSimplifyInvokeNoUnwind(const Function *F);
 
 } // end namespace llvm