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/nexthop.h b/libc/kernel/uapi/linux/nexthop.h
new file mode 100644
index 0000000..a2a959f
--- /dev/null
+++ b/libc/kernel/uapi/linux/nexthop.h
@@ -0,0 +1,55 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_NEXTHOP_H
+#define _UAPI_LINUX_NEXTHOP_H
+#include <linux/types.h>
+struct nhmsg {
+  unsigned char nh_family;
+  unsigned char nh_scope;
+  unsigned char nh_protocol;
+  unsigned char resvd;
+  unsigned int nh_flags;
+};
+struct nexthop_grp {
+  __u32 id;
+  __u8 weight;
+  __u8 resvd1;
+  __u16 resvd2;
+};
+enum {
+  NEXTHOP_GRP_TYPE_MPATH,
+  __NEXTHOP_GRP_TYPE_MAX,
+};
+#define NEXTHOP_GRP_TYPE_MAX (__NEXTHOP_GRP_TYPE_MAX - 1)
+enum {
+  NHA_UNSPEC,
+  NHA_ID,
+  NHA_GROUP,
+  NHA_GROUP_TYPE,
+  NHA_BLACKHOLE,
+  NHA_OIF,
+  NHA_GATEWAY,
+  NHA_ENCAP_TYPE,
+  NHA_ENCAP,
+  NHA_GROUPS,
+  NHA_MASTER,
+  __NHA_MAX,
+};
+#define NHA_MAX (__NHA_MAX - 1)
+#endif