gdatetime testcase uses glib (which uses libintl), but *alsi* calls
libintl functions on its own, as part of the testing process.
Therefore it must be linked to libintl like any other program that
uses it.
https://bugzilla.gnome.org/show_bug.cgi?id=794556
The CI infrastructure is shared and running inside a containerised
environment, which means tests may take more time to finish on it
than they would on a faster, personal machine.
https://bugzilla.gnome.org/show_bug.cgi?id=793635
Disable gio tests on Windows, fix .gitignore to not ignore
config.h.meson, and add more things to it.
Rename the library file naming and versioning to match what Autotools
outputs, e.g., libglib-2.0.so.0.5000.2 on Linux, libglib-2.0-0.dll and
glib-2.0-0.dll on Windows with MSVC.
Several more tiny fixes, more executables built and installed, install
pkg-config and m4 files, fix building of gobject tests.
Changes to gdbus-codegen to support out-of-tree builds without
environment variables set (which you can't in Meson). We now add the
build directory to the Python module search path.
