Update to v4.17.3 kernel headers.

Test: Builds, boots on a walleye.
Change-Id: I389d8b61ec00ea309e38d1b1a2e0dace48c21edb
diff --git a/libc/kernel/uapi/drm/virtgpu_drm.h b/libc/kernel/uapi/drm/virtgpu_drm.h
index 31e6715..6b7fb0b 100644
--- a/libc/kernel/uapi/drm/virtgpu_drm.h
+++ b/libc/kernel/uapi/drm/virtgpu_drm.h
@@ -44,6 +44,7 @@
   __u32 pad;
 };
 #define VIRTGPU_PARAM_3D_FEATURES 1
+#define VIRTGPU_PARAM_CAPSET_QUERY_FIX 2
 struct drm_virtgpu_getparam {
   __u64 param;
   __u64 value;