Fix the definition of drm_virtgpu_execbuffer_with_ring_idx

In the kernel uapi headers[1], drm_virtgpu_execbuffer is defined as a
__s32.

[1] https://android.googlesource.com/kernel/common-modules/virtual-device/+/android13-5.10/uapi/drm/virtgpu_drm.h#73

Test: run the emulator
Change-Id: Id52278eac897ac7e8c5cbcb39da564c09c7c718d
1 file changed