Update to v5.8 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.8

Test: NA
Change-Id: I2231c877589820fc09800a200cf4ac62ba74b04c
diff --git a/libc/kernel/uapi/linux/virtio_ids.h b/libc/kernel/uapi/linux/virtio_ids.h
index 9fd6b65..7b67d76 100644
--- a/libc/kernel/uapi/linux/virtio_ids.h
+++ b/libc/kernel/uapi/linux/virtio_ids.h
@@ -33,6 +33,7 @@
 #define VIRTIO_ID_VSOCK 19
 #define VIRTIO_ID_CRYPTO 20
 #define VIRTIO_ID_IOMMU 23
+#define VIRTIO_ID_MEM 24
 #define VIRTIO_ID_FS 26
 #define VIRTIO_ID_PMEM 27
 #define VIRTIO_ID_MAC80211_HWSIM 29