qemu.tests: Update the tests use utils_netperf support compile_option from cfg files

We need add different comile_option for utils_netperf to compile the code in different
platform. So add this support for related test cases.

Signed-off-by: Yiqiao Pu <ypu@redhat.com>
Merge pull request #229 from ypu/netperf_compile_option

qemu.tests: Update the tests use utils_netperf support compile_option