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/DebugInfo/inline-debug-info-multiret.ll

@@ -57,7 +57,7 @@ declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
 
 declare i32 @_Z8test_exti(i32)
 
-define i32 @_Z5test2v()  {
+define i32 @_Z5test2v() personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
 entry:
   %exn.slot = alloca i8*
   %ehselector.slot = alloca i32
@@ -70,7 +70,7 @@ invoke.cont:                                      ; preds = %entry
   br label %try.cont, !dbg !23
 
 lpad:                                             ; preds = %entry
-  %1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+  %1 = landingpad { i8*, i32 }
           catch i8* bitcast (i8** @_ZTIi to i8*), !dbg !21
   %2 = extractvalue { i8*, i32 } %1, 0, !dbg !21
   store i8* %2, i8** %exn.slot, !dbg !21