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/X86/catch.ll

@@ -7,13 +7,13 @@
 ; CHECK-NEXT: .quad   .Lstr
 
 @str = private unnamed_addr constant [12 x i8] c"NSException\00"
-define void @f() {
+define void @f() personality i8* bitcast (void ()* @h to i8*) {
   invoke void @g()
           to label %invoke.cont unwind label %lpad
 invoke.cont:
   ret void
 lpad:
-  %tmp14 = landingpad { i8*, i32 } personality i8* bitcast (void ()* @h to i8*)
+  %tmp14 = landingpad { i8*, i32 }
            catch i8* getelementptr inbounds ([12 x i8], [12 x i8]* @str, i64 0, i64 0)
   ret void
 }