fix a compile warning about out of order field init

http://cs/h/prodkernel/kernel/upstream/torvalds/linux-2.6/+/master:tools/include/uapi/linux/bpf.h?l=1486

struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
		__u32		prog_fd;
		__u32		retval;
		__u32		data_size_in;
		__u32		data_size_out;
		__aligned_u64	data_in;
		__aligned_u64	data_out;
...

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I2c08b65bdcdbd7fb9872b6d4cbbf542fe28ef916
diff --git a/staticlibs/native/bpf_syscall_wrappers/include/BpfSyscallWrappers.h b/staticlibs/native/bpf_syscall_wrappers/include/BpfSyscallWrappers.h
index ba16d53..13f7cb3 100644
--- a/staticlibs/native/bpf_syscall_wrappers/include/BpfSyscallWrappers.h
+++ b/staticlibs/native/bpf_syscall_wrappers/include/BpfSyscallWrappers.h
@@ -175,8 +175,8 @@
     return bpf(BPF_PROG_RUN, {
                                      .test = {
                                              .prog_fd = BPF_FD_TO_U32(prog_fd),
-                                             .data_in = ptr_to_u64(data),
                                              .data_size_in = data_size,
+                                             .data_in = ptr_to_u64(data),
                                      },
                              });
 }