Update to v4.15 kernel headers.

Test: Compiles, boots bullhead/hikey960.
Change-Id: I118beb8b6cac0881b1270f9bf6981959297a41a8
diff --git a/libc/kernel/uapi/rdma/vmw_pvrdma-abi.h b/libc/kernel/uapi/rdma/vmw_pvrdma-abi.h
index 2062366..7c13680 100644
--- a/libc/kernel/uapi/rdma/vmw_pvrdma-abi.h
+++ b/libc/kernel/uapi/rdma/vmw_pvrdma-abi.h
@@ -119,6 +119,8 @@
 };
 struct pvrdma_create_srq {
   __u64 buf_addr;
+  __u32 buf_size;
+  __u32 reserved;
 };
 struct pvrdma_create_srq_resp {
   __u32 srqn;