gallium/targets/d3dadapter9: Release the pipe_screen at destruction.
gallium/targets/d3dadapter9: Release the pipe_screen at destruction.

We weren't releasing hal and ref, causing some issues (threads not released, etc)

Reviewed-by: Tiziano Bacocco <2a82869f7317db18254323fa12ab4a27cc39e639@gmail.com>
Signed-off-by: Axel Davy <2b6ef604b998fb81662f85c329e4fc020eae8e5d@ens.fr>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler