Pass enum instead of bool to new linkInModule call in llvm-link

Pass enum instead of bool to new linkInModule call in llvm-link

A new call I added to linkInModule from llvm-link in r251866
was still passing in a boolean for an argument that was changed to an
enum in r246561. I didn't catch this in my merge since the bool false
matched the flag value it mapped to.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@251925 91177308-0d34-0410-b5e6-96231b3b80d8