Update to v5.15 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.15

Test: Builds, and ran bionic unit tests on flame.
Change-Id: I86901ea6d89fb0f7384b90a47bef35d194083c24
diff --git a/libc/kernel/uapi/linux/virtio_vsock.h b/libc/kernel/uapi/linux/virtio_vsock.h
index bff6164..73b5d49 100644
--- a/libc/kernel/uapi/linux/virtio_vsock.h
+++ b/libc/kernel/uapi/linux/virtio_vsock.h
@@ -62,6 +62,7 @@
   VIRTIO_VSOCK_SHUTDOWN_SEND = 2,
 };
 enum virtio_vsock_rw {
-  VIRTIO_VSOCK_SEQ_EOR = 1,
+  VIRTIO_VSOCK_SEQ_EOM = 1,
+  VIRTIO_VSOCK_SEQ_EOR = 2,
 };
 #endif