* Now you can build the python modules without building the full UI,
which is mostly useful for docs builds so we can do a minimal compile
and still generate the docs.
* This allows a buidler to customise from e.g. /usr/lib/librenderdoc.so
to /usr/lib/renderdoc/librenderdoc.so - which is harmless since the
library is 'private' and not intended to be linked against directly.
* This really isn't ideal as it means the python module will only work
with that specific major.minor version of python, when it could in
theory work with any python version above 3.2 or so, depending on what
features are used.
* Since we're not distributing these modules yet though, add this
linking to support -Wl,--no-undefined.
baldurk