Able to build with Meson. For use in gstreamer-sharp

[mikkeljohnsen]

Using Meson to build GtkSharp. Wraps the build.sh.

This will make it easier use consume i gstreamer-sharp.

[harry-cpp]

If you want Gstreamer Sharp added here (or connected to the systems here), I have a branch for that: https://github.com/GtkSharp/GtkSharp/tree/GstSharp

It needs a bit of updating, but other than that, its good to go.

[mikkeljohnsen]

@harry-cpp Do you know what the "c" abi code are for, in the gstreamer-sharp project. Is that even necessary ?

[thiblahute]

@harry-cpp Do you know what the "c" abi code are for, in the gstreamer-sharp project. Is that even necessary ?

This is used to ensure that generated ABI is correct and that GStreamer doesn't break the ABI, or that the bindings are updated in case it does (in the -bad libraries we might).