Update to v4.19 kernel headers.

Test: Builds and boots.
Change-Id: I99a9ed79666e143b47f02ca4e59eed94f69b7e4a
(cherry picked from commit a981e2e52e2e95a65fa9c9b6fb16dcb4c83dd576)
diff --git a/libc/kernel/uapi/linux/xfrm.h b/libc/kernel/uapi/linux/xfrm.h
index 5ec7193..ea0ef5e 100644
--- a/libc/kernel/uapi/linux/xfrm.h
+++ b/libc/kernel/uapi/linux/xfrm.h
@@ -258,8 +258,11 @@
   XFRMA_ADDRESS_FILTER,
   XFRMA_PAD,
   XFRMA_OFFLOAD_DEV,
-  XFRMA_OUTPUT_MARK,
+  XFRMA_SET_MARK,
+  XFRMA_SET_MARK_MASK,
+  XFRMA_IF_ID,
   __XFRMA_MAX
+#define XFRMA_OUTPUT_MARK XFRMA_SET_MARK
 #define XFRMA_MAX (__XFRMA_MAX - 1)
 };
 struct xfrm_mark {