python: Arrange file in Python module into uhd/ subdirectory

This adds the host/python/uhd subdirectory, which will add all files
that go into the actual Python module once installed. Before, all Python
files were directly in host/python and got sorted into their appropriate
destination folders during configuration and installation.

This change doesn't change anything (Python modules will look the same
as they do now), except that it makes the source tree a tad neater, but
more importantly, it creates a consistent directory structure when
adding submodules to the uhd module. Apart from the PyBind11-generated
shared object file (which gets generated during build time), the uhd/
subdirectory in host/python exactly resembles the Python module once
installed, so it's more obvious where to add new submodules and files.

0 files changed, 0 insertions, 0 deletions