From the files under "shared/nm-utils" we build an internal library
that provides glib-based helper utilities.
Move the files of that basic library to a new subdirectory
"shared/nm-glib-aux" and rename the helper library "libnm-core-base.la"
to "libnm-glib-aux.la".
Reasons:
- the name "utils" is overused in our code-base. Everything's an
"utils". Give this thing a more distinct name.
- there were additional files under "shared/nm-utils", which are not
part of this internal library "libnm-utils-base.la". All the files
that are part of this library should be together in the same
directory, but files that are not, should not be there.
- the new name should better convey what this library is and what is isn't:
it's a set of utilities and helper functions that extend glib with
funcitonality that we commonly need.
There are still some files left under "shared/nm-utils". They have less
a unifying propose to be in their own directory, so I leave them there
for now. But at least they are separate from "shared/nm-glib-aux",
which has a very clear purpose.
(cherry picked from commit 80db06f768)
nm_utils_get_monotonic_timestamp*() inherrently use static data. Let's
initialize it in a thread safe manner.
nm_utils_get_monotonic_timestamp*() are a fundamental utility function
that should work correctly in all cases. Such a low level function should
be thread safe.
This is independent functionality that only depends on linux API
and glib.
Note how "nm-logging" uses this for getting the timestamps. This
makes "nm-logging.c" itself dependen on "src/nm-core-utils.c",
for little reason.
