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/Transforms/PruneEH/recursivetest.ll

@@ -1,23 +1,23 @@
 ; RUN: opt < %s -prune-eh -S | not grep invoke
 
-define internal i32 @foo() {
+define internal i32 @foo() personality i32 (...)* @__gxx_personality_v0 {
 	invoke i32 @foo( )
 			to label %Normal unwind label %Except		; <i32>:1 [#uses=0]
 Normal:		; preds = %0
 	ret i32 12
 Except:		; preds = %0
-        landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
+        landingpad { i8*, i32 }
                 catch i8* null
 	ret i32 123
 }
 
-define i32 @caller() {
+define i32 @caller() personality i32 (...)* @__gxx_personality_v0 {
 	invoke i32 @foo( )
 			to label %Normal unwind label %Except		; <i32>:1 [#uses=0]
 Normal:		; preds = %0
 	ret i32 0
 Except:		; preds = %0
-        landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
+        landingpad { i8*, i32 }
                 catch i8* null
 	ret i32 1
 }