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

test/CodeGen/ARM/sjljehprepare-lower-empty-struct.ll

@@ -10,7 +10,7 @@
 ; __Unwind_SjLj_Register and actual @bar invocation
 
 
-define i8* @foo(i8 %a, {} %c) {
+define i8* @foo(i8 %a, {} %c) personality i8* bitcast (i32 (...)* @baz to i8*) {
 entry:
 ; CHECK: bl __Unwind_SjLj_Register
 ; CHECK-NEXT: {{[A-Z][a-zA-Z0-9]*}}:
@@ -22,7 +22,7 @@ unreachable:
   unreachable
 
 handler:
-  %tmp = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @baz to i8*)
+  %tmp = landingpad { i8*, i32 }
   cleanup
   resume { i8*, i32 } undef
 }