Update to v5.16 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.16

Test: Builds and bionic unit tests pass.
Change-Id: I2522c4f2a0efb9f8a193e1f2d65868e478217502
diff --git a/libc/kernel/uapi/linux/amt.h b/libc/kernel/uapi/linux/amt.h
new file mode 100644
index 0000000..049006d
--- /dev/null
+++ b/libc/kernel/uapi/linux/amt.h
@@ -0,0 +1,40 @@
+/****************************************************************************
+ ****************************************************************************
+ ***
+ ***   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_AMT_H_
+#define _UAPI_AMT_H_
+enum ifla_amt_mode {
+  AMT_MODE_GATEWAY = 0,
+  AMT_MODE_RELAY,
+  __AMT_MODE_MAX,
+};
+#define AMT_MODE_MAX (__AMT_MODE_MAX - 1)
+enum {
+  IFLA_AMT_UNSPEC,
+  IFLA_AMT_MODE,
+  IFLA_AMT_RELAY_PORT,
+  IFLA_AMT_GATEWAY_PORT,
+  IFLA_AMT_LINK,
+  IFLA_AMT_LOCAL_IP,
+  IFLA_AMT_REMOTE_IP,
+  IFLA_AMT_DISCOVERY_IP,
+  IFLA_AMT_MAX_TUNNELS,
+  __IFLA_AMT_MAX,
+};
+#define IFLA_AMT_MAX (__IFLA_AMT_MAX - 1)
+#endif