Update to v5.13 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.13

Test: Builds, bionic unit tests.
Change-Id: Ia4360ca4a2808206f64187dcb234d73c5752624b
diff --git a/libc/kernel/uapi/drm/drm_mode.h b/libc/kernel/uapi/drm/drm_mode.h
index 643ae98..9a6a6d9 100644
--- a/libc/kernel/uapi/drm/drm_mode.h
+++ b/libc/kernel/uapi/drm/drm_mode.h
@@ -223,6 +223,7 @@
 #define DRM_MODE_CONNECTOR_DPI 17
 #define DRM_MODE_CONNECTOR_WRITEBACK 18
 #define DRM_MODE_CONNECTOR_SPI 19
+#define DRM_MODE_CONNECTOR_USB 20
 struct drm_mode_get_connector {
   __u64 encoders_ptr;
   __u64 modes_ptr;