Create meson build files

[joshdoe]

Wondering if it's time to add meson build files as GStreamer has already done, even though the CMake files have been mostly updated to support Linux. It would integrate better with the GStreamer build environment, however requires a few more tools than just CMake, and meson is not as familiar to as many developers as CMake. I wonder if @5shekel or anyone else has input.

[5shekel]

as a latecomer to the gstreamer world i learnt to deal with meson before cmake.
both have issues, but gstreamer has chosen one,

• it will make integration with a gst-build possible.