QtCompositor hardware integrations as plugins

Rather than defining which hardware integration should be used at
compile time, we should build each hardware integration as a plugin, and
load the one we want at runtime.

The default hardware integration is wayland-egl, but you are able to
override this using the environment variable
QT_WAYLAND_HARDWARE_INTEGRATION

Backends tested:
wayland-egl
xcomposite-egl

Backends untested:
xcomposite-glx
brcm-egl

Change-Id: Idee66574d232a9236898f68ca64145f471b1bb80
Reviewed-by: Andy Nichols <andy.nichols@digia.com>
Reviewed-by: Jørgen Lind <jorgen.lind@gmail.com>
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

0 files changed, 0 insertions, 0 deletions