docs: rename libs xml/version.xml to xml/version-utils.xml

It seems that gtk-docs stuff is confused when we use version.xml
(package version) and xml/version.xml (library version functions).

Signed-off-by: Karel Zak <kzak@redhat.com>
libsmartcols: fix docs

Signed-off-by: Karel Zak <kzak@redhat.com>
tests: remove deprecated mount tests

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
tests: ignore deprecated last

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
build-sys: use automake's PYTHON primary for __init__.py

Actually the initial reason for this commit was to remove execute
permission from installed __init__.py.

Now after discovering automake's _PYTHON suffix we slightly cleanup
Makemodule.am and we will install byte compiled .pyc and .pyo files.

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
build-sys: restore make distcheck's configure flags

They got lost with --enable-most-builds in 08b1c219.

Note additionally we add --enable-gtk-doc but don't add
--with-systemd because there are still many systems where systemd
is not available.

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
build-sys: fix update-potfiles script

Now are using "git ls-files" to avoid finding non-project
files or autoheaders which could break the dist tarball.

For non-git source dirs we assume that any existing POTFILES.in is
up-todate (build from tarball) or we provide at least an empty list
to not be a show-stopper for builds from poor "git archive".

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>