Sometimes ninja decides to compile tests/interactive-panels/main.c,
which requires shell/resources.h, before shell/resources.h is generated.
The fix is to use 'sources' argument of declare_dependency to properly
declare the dependency on generated headers.
A fix for tests/datetime and panels/datetime is also included in the
commit to fix a similar problem.
Closes https://gitlab.gnome.org/GNOME/gnome-control-center/merge_requests/472
Recent versions of Gettext are able to translate several formats
that are used in GNOME applications. This patch migrates from
Intltool to Gettext by using meson's i18n features.
https://bugzilla.gnome.org/show_bug.cgi?id=787588
Meson is a build system focused on speed an ease of use, which
helps speeding up the software development. This patch adds meson
support along autotools.
https://bugzilla.gnome.org/show_bug.cgi?id=785414
