Update to v4.19 kernel headers.

Test: Builds and boots.
Change-Id: I99a9ed79666e143b47f02ca4e59eed94f69b7e4a
(cherry picked from commit a981e2e52e2e95a65fa9c9b6fb16dcb4c83dd576)
diff --git a/libc/kernel/uapi/rdma/hns-abi.h b/libc/kernel/uapi/rdma/hns-abi.h
index 8c66f27..23bedf9 100644
--- a/libc/kernel/uapi/rdma/hns-abi.h
+++ b/libc/kernel/uapi/rdma/hns-abi.h
@@ -34,6 +34,7 @@
   __u8 log_sq_stride;
   __u8 sq_no_prefetch;
   __u8 reserved[5];
+  __aligned_u64 sdb_addr;
 };
 struct hns_roce_ib_create_qp_resp {
   __aligned_u64 cap_flags;