make: fix "make doc" invocations

python insists on adding . to python.path, so we always import the systemd
in the top-level directory instead of the one in build/ that we want. Let's
cd into docs/ first, so that we get the right module imported.

Also, replace sphinx-build calls with $(PYTHON) -m sphinx. This has the
advantage that once $(PYTHON) is set, the appropriate sphinx executable is
chosen.

0 files changed, 0 insertions, 0 deletions