Update to kernel headers v5.3.2.

Test: Builds and run unit tests on taimen/cuttlefish.
Change-Id: I6ebd8f179d159ac974555e8edca588083e8081b3
diff --git a/libc/kernel/uapi/linux/virtio_pmem.h b/libc/kernel/uapi/linux/virtio_pmem.h
new file mode 100644
index 0000000..38740f3
--- /dev/null
+++ b/libc/kernel/uapi/linux/virtio_pmem.h
@@ -0,0 +1,35 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   This header was automatically generated from a Linux kernel header
+ ***   of the same name, to make information necessary for userspace to
+ ***   call into the kernel available to libc.  It contains only constants,
+ ***   structures, and macros generated from the original header, and thus,
+ ***   contains no copyrightable information.
+ ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
+ ****************************************************************************
+ ****************************************************************************/
+#ifndef _UAPI_LINUX_VIRTIO_PMEM_H
+#define _UAPI_LINUX_VIRTIO_PMEM_H
+#include <linux/types.h>
+#include <linux/virtio_ids.h>
+#include <linux/virtio_config.h>
+struct virtio_pmem_config {
+  __u64 start;
+  __u64 size;
+};
+#define VIRTIO_PMEM_REQ_TYPE_FLUSH 0
+struct virtio_pmem_resp {
+  __le32 ret;
+};
+struct virtio_pmem_req {
+  __le32 type;
+};
+#endif