Added gst_gralloc_allocator_free and gst_gralloc_allocator_finalize
Added gst_gralloc_allocator_free and gst_gralloc_allocator_finalize

sledges/gst-droid,mlehtima/gst-droid,foolab/gst-droid,sledges/gst-droid,foolab/gst-droid,sledges/gst-droid,mlehtima/gst-droid,sailfishos/gst-droid