Sampler improvements (#22)

* Sampler improvements

- roctracer_flush_activity
- papi_array in backtrace
- fixed sampler trait specializations
- split main_bundle into main and gotcha bundles
- cmake option display

* timemory update

* EINTR handling + debug_{pid,tid}

- sampler handles EINTR for sem_init and sem_destroy
- OMNITRACE_DEBUG_{TIDS,PIDS} env variables

* Increase waitForStatusChange

src/library/components/roctracer.cpp

@@ -133,7 +133,7 @@ roctracer::tear_down()
     OMNITRACE_DEBUG("[%s]\n", __FUNCTION__);
 
     // flush all the activity
-    if(roctracer_default_pool() != nullptr)
+    // if(roctracer_default_pool() != nullptr)
     {
         ROCTRACER_CALL(roctracer_flush_activity());
     }