-Wdeprecated cleanup: Make CallGraph movable by default by using unique_ptr members rather than raw pointers.

The only place that tries to return a CallGraph by value
(CallGraphAnalysis::run) doesn't seem to be used right now, but it's a
reasonable bit of cleanup anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244122 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed