There was a call for thread create function without result check.
Added result check and message printout after failure.
Coverity issue: 143441
Fixes: 433ba6228f9a ("examples/performance-thread: add pthread_shim app")
Signed-off-by: Jacek Piasecki <jacekx.piasecki@intel.com>
Acked-by: Michal Jastrzebski <michalx.k.jastrzebski@intel.com>
842ee032e4