src/rx/rx_packet.c: Fix misleading indentation

src/rx/rx_packet.c: Fix misleading indentation

Fixes these warnings (errors with --enable-checking) from GCC 6.2:

rx_packet.c: In function ‘rxi_ReceiveDebugPacket’:
rx_packet.c:2009:9: error: this ‘if’ clause does not guard... [-Werror=misleading-indentation]
         if (rx_stats_active)
         ^~
rx_packet.c:2011:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
      s = (afs_int32 *) & rx_stats;
      ^
rx_packet.c:2017:9: error: this ‘if’ clause does not guard... [-Werror=misleading-indentation]
         if (rx_stats_active)
         ^~
rx_packet.c:2019:6: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘if’
      rxi_SendDebugPacket(ap, asocket, ahost, aport, istack);
      ^~~~~~~~~~~~~~~~~~~

Reviewed-on: https://gerrit.openafs.org/12436
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
(cherry picked from commit 0aeb8c17a2701169ddb7397d951c73cf361087c8)

Change-Id: Ic7db23cecdcb7f02d1529326b336d62339af8460
Reviewed-on: https://gerrit.openafs.org/12483
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>