Revert part of my previous patch, we should be using libedit under linux for command line editing.
Revert part of my previous patch, we should be using libedit under
linux for command line editing.


git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@189820 91177308-0d34-0410-b5e6-96231b3b80d8

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