Update to v5.18 kernel headers.

Kernel headers coming from:

Git: https://android.googlesource.com/kernel/common/
Branch: android-mainline
Tag: android-mainline-5.18

Test: Builds.
Test: All bionic unit tests pass on a coral device.
Change-Id: I5700813eec0fb0db55bee4d75b129400b7a239bd
diff --git a/libc/kernel/uapi/linux/net_dropmon.h b/libc/kernel/uapi/linux/net_dropmon.h
index 01b76cb..35f70a5 100644
--- a/libc/kernel/uapi/linux/net_dropmon.h
+++ b/libc/kernel/uapi/linux/net_dropmon.h
@@ -87,6 +87,7 @@
   NET_DM_ATTR_SW_DROPS,
   NET_DM_ATTR_HW_DROPS,
   NET_DM_ATTR_FLOW_ACTION_COOKIE,
+  NET_DM_ATTR_REASON,
   __NET_DM_ATTR_MAX,
   NET_DM_ATTR_MAX = __NET_DM_ATTR_MAX - 1
 };