Update netperf package to fix compile issue

When run 'make' command to compile netperf, meet following error:
  gcc     -o netperf netperf.o netlib.o netsh.o nettest_bsd.o nettest_dlpi.o nettest_unix.o nettest_xti.o nettest_sctp.o nettest_sdp.o nettest_omni.o net_uuid.o dscp.o netcpu_none.o netrt_none.o netdrv_none.o netslot_none.o netsys_none.o netsec_none.o  -lm
  /usr/bin/ld: nettest_omni.o:(.bss+0x398): multiple definition of `loc_nodelay'; nettest_bsd.o:(.bss+0x20): first defined here
  /usr/bin/ld: nettest_omni.o:(.bss+0x39c): multiple definition of `rem_nodelay'; nettest_bsd.o:(.bss+0x24): first defined here
  /usr/bin/ld: nettest_omni.o:(.bss+0x3a0): multiple definition of `loc_sndavoid'; nettest_bsd.o:(.bss+0x30): first defined here
  /usr/bin/ld: nettest_omni.o:(.bss+0x3a4): multiple definition of `loc_rcvavoid'; nettest_bsd.o:(.bss+0x34): first defined here
  /usr/bin/ld: nettest_omni.o:(.bss+0x3a8): multiple definition of `rem_sndavoid'; nettest_bsd.o:(.bss+0x38): first defined here
  /usr/bin/ld: nettest_omni.o:(.bss+0x3ac): multiple definition of `rem_rcvavoid'; nettest_bsd.o:(.bss+0x3c): first defined here
  collect2: error: ld returned 1 exit status
  make[3]: *** [Makefile:443: netperf] Error 1

One patch [1] is to fix this issue. According to this patch to
update netperf package.

[1] HewlettPackard/netperf#46

Signed-off-by: lcheng <lcheng@redhat.com>