Update to v4.20.1 kernel headers.

This includes one manual change:

In the file bionic/libc/kernel/uapi/linux/in.h, the macro IN_BADCLASS
was not definied correctly. Change the macro from:

  #define IN_BADCLASS(a) ((((long int) (a)) == 0xffffffff)

to:

  #define IN_BADCLASS(a) (((long int) (a)) == (long int)0xffffffff)

This change is being pushed to the upstream kernels.

Test: Builds and boots.
Change-Id: Ia304773a9dc6789b34d9769d73742384d6afb571
Merged-In: Ia304773a9dc6789b34d9769d73742384d6afb571
(cherry picked from commit 967fb01cce73591281e7804e2c0fa9f83b618f5b)
diff --git a/libc/kernel/uapi/rdma/ib_user_verbs.h b/libc/kernel/uapi/rdma/ib_user_verbs.h
index 3baf4ed..6ca4413 100644
--- a/libc/kernel/uapi/rdma/ib_user_verbs.h
+++ b/libc/kernel/uapi/rdma/ib_user_verbs.h
@@ -619,6 +619,22 @@
   __u32 length;
   __u32 lkey;
 };
+enum ib_uverbs_wr_opcode {
+  IB_UVERBS_WR_RDMA_WRITE = 0,
+  IB_UVERBS_WR_RDMA_WRITE_WITH_IMM = 1,
+  IB_UVERBS_WR_SEND = 2,
+  IB_UVERBS_WR_SEND_WITH_IMM = 3,
+  IB_UVERBS_WR_RDMA_READ = 4,
+  IB_UVERBS_WR_ATOMIC_CMP_AND_SWP = 5,
+  IB_UVERBS_WR_ATOMIC_FETCH_AND_ADD = 6,
+  IB_UVERBS_WR_LOCAL_INV = 7,
+  IB_UVERBS_WR_BIND_MW = 8,
+  IB_UVERBS_WR_SEND_WITH_INV = 9,
+  IB_UVERBS_WR_TSO = 10,
+  IB_UVERBS_WR_RDMA_READ_WITH_INV = 11,
+  IB_UVERBS_WR_MASKED_ATOMIC_CMP_AND_SWP = 12,
+  IB_UVERBS_WR_MASKED_ATOMIC_FETCH_AND_ADD = 13,
+};
 struct ib_uverbs_send_wr {
   __aligned_u64 wr_id;
   __u32 num_sge;