Remove nativecodegen as it forces the native target libraries to be linked in regardless of whether the target was specified in LLVM_TARGETS_TO_BUILD
Remove nativecodegen as it forces the native target libraries to be linked in regardless of whether the target was specified in LLVM_TARGETS_TO_BUILD

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@201519 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb