[CMake] Partial revert of r293686
[CMake] Partial revert of r293686

This change reverts the lldb-server part of r293686, which is having trouble on Linux bots. I'm not sure if I can make lldb-server work correctly until the full dependency graph is fixed.

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@293690 91177308-0d34-0410-b5e6-96231b3b80d8

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