Fixed lldb cmake build to include missing libpanel/libncurses.

These libraries became necessary recently to link properly.
I think they are needed everywhere non-Windows, but if they
end up breaking on a given platform, we can conditionalize this
further.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@202282 91177308-0d34-0410-b5e6-96231b3b80d8