[ORC] Simplify LLJIT::Create by removing the ExecutionSession parameter.

The Create method can just construct the ExecutionSession, rather than having the
client pass it in.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@341872 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed