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/Analysis/LazyCallGraph/basic.ll

@@ -63,7 +63,7 @@ entry:
   ret void
 }
 
-define void ()* @test1(void ()** %x) {
+define void ()* @test1(void ()** %x) personality i32 (...)* @__gxx_personality_v0 {
 ; CHECK-LABEL: Call edges in function: test1
 ; CHECK-NEXT: -> f12
 ; CHECK-NEXT: -> f11
@@ -97,7 +97,7 @@ exit:
   ret void ()* @f11
 
 unwind:
-  %res = landingpad { i8*, i32 } personality i32 (...)* @__gxx_personality_v0
+  %res = landingpad { i8*, i32 }
           cleanup
   resume { i8*, i32 } { i8* bitcast (void ()* @f12 to i8*), i32 42 }
 }