Up to now, the "include" directory contained (only) header files that were
used project-wide by libs, core, clients, et al.
Since the directory now also contains a non-header file, the "include"
name is misleading. Instead of adding yet another directory that is
project-wide, with non-header-only content, rename the "include"
directory to "shared".
Before, build_clean.sh always required building all NetworkManager
and doing another `make distcheck` before calling rpmbuild.
That is still a good idea, to ensure that we get a proper build.
For some quick testing however, lets speed this up with a new
--dist argument that only calls `make dist`.
Signed-off-by: Thomas Haller <thaller@redhat.com>
