Remove spurious debugging message from CMake.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@213553 91177308-0d34-0410-b5e6-96231b3b80d8
Rename dosep.ty to dosep.py

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@213555 91177308-0d34-0410-b5e6-96231b3b80d8