scripts: test build of performance-thread example
scripts: test build of performance-thread example

This example is not part of the baseline because of its
experimental state. That's why it must be tested separately.

Fixes: b700090c8cec ("examples/performance-thread: mark as experimental")

Signed-off-by: Thomas Monjalon <ee2fa8b2681c737f775687e475dcbf2028a412f1@6wind.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk