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/LowerInvoke/2003-12-10-Crash.ll

@@ -6,7 +6,7 @@ declare void @baz()
 
 declare void @bar()
 
-define void @foo() {
+define void @foo() personality i32 (...)* @__gxx_personality_v0 {
 then:
 	invoke void @baz( )
 			to label %invoke_cont.0 unwind label %try_catch
@@ -15,7 +15,7 @@ invoke_cont.0:		; preds = %then
 			to label %try_exit unwind label %try_catch
 try_catch:		; preds = %invoke_cont.0, %then
 	%__tmp.0 = phi i32* [ null, %invoke_cont.0 ], [ null, %then ]		; <i32*> [#uses=0]
-  %res = landingpad { i8* } personality i32 (...)* @__gxx_personality_v0
+  %res = landingpad { i8* }
           cleanup
 	ret void
 try_exit:		; preds = %invoke_cont.0

test/Transforms/LowerInvoke/lowerinvoke.ll

@@ -2,7 +2,7 @@
 
 declare i32 @external_func(i64 %arg)
 
-define i32 @invoke_test(i64 %arg) {
+define i32 @invoke_test(i64 %arg) personality i8* null {
 entry:
   %result = invoke fastcc i32 @external_func(i64 inreg %arg)
       to label %cont unwind label %lpad
@@ -10,7 +10,7 @@ cont:
   ret i32 %result
 lpad:
   %phi = phi i32 [ 99, %entry ]
-  %lp = landingpad { i8*, i32 } personality i8* null cleanup
+  %lp = landingpad { i8*, i32 } cleanup
   ret i32 %phi
 }