@JDevlieghere changed the LLDB_DISABLE_PYTHON to LLDB_ENABLE_PYTHON. You should add a LLDB_ENABLE_PYTHON=NO to the cmake invocation, the docs should be updated for this.
The reason that the python support is disabled is purely to avoid having to install Python manually. If you are willing to go to https://python.org and download the installer and run that, it will provide the necessary libraries for python.
Ah, right! The point of that was to actually disable the python support on 5.2. However, with the 5.3 release, I am attempting to enable the python support on the release builds so that the formatters for the LLDB REPL can be used.