qemu.cfg.virtual_nic_send_buffer: Update configure for netperf_udp sub case.

We change to use netperf under shard/deps folder by default in netperf_udp.
So update virtual_nic_send_buffer.
Signed-off-by: NFeng Yang <fyang@redhat.com>

qemu/tests/cfg/virtual_nic_send_buffer.cfg

@@ -11,10 +11,10 @@
     hostpasswd = redhat
     message_size_range = 580 590 1
     netperf_files = netperf-2.6.0.tar.bz2
-    netperf_download_link = ftp://ftp.netperf.org/netperf/netperf-2.6.0.tar.bz2
+    netperf_links = deps/netperf-2.6.0.tar.bz2
     pkg_md5sum = 9654ffdfd4c4f2c93ce3733cd9ed9236
-    netperf_files = netperf-2.6.0.tar.bz2
-    setup_cmd = "cd /home && rm -rf netperf-2.6.0 && tar xvfj netperf-2.6.0.tar.bz2 && cd netperf-2.6.0 && ./configure --enable-burst --enable-demo=yes && make"
+    remote_dir = /var/tmp
+    setup_cmd = "cd %s && rm -rf netperf-2.6.0 && tar xvfj netperf-2.6.0.tar.bz2 && cd netperf-2.6.0 && ./configure --enable-burst --enable-demo=yes && make"
     netserver_cmd = src/netserver
     sub_test_name = netperf_udp
     netperf_cmd = src/netperf -l 10 -H %s -t %s -- -m %s -b 64 -D