[LLJIT] Add API to expose linking layer from LLJIT classes
[LLJIT] Add API to expose linking layer from LLJIT classes

Summary: This patch just surfaces the object linking layer from the LLJIT classes so that clients can take advantage of the changes implemented in r341154.

Reviewers: lhames

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D51551

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@342567 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm