[Partial Inlining] Fix small bug in detecting if we did something

- It's possible for 'Changed' to return as false even if we did
  partial inline something.  Fixed to accumulate return values

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@338896 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed