[PGO] Fix deserialize bug 

Raw function pointer collected by value
profile data may be from external functions
that are not instrumented. They won't have
mapping data to be used by the deserializer.
Force the value to be 0 in this case.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265890 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed