!3881 fix thread pool bug

Merge pull request !3881 from 张学同/to_merge

mindspore/lite/src/lite_session.cc

@@ -167,6 +167,7 @@ std::vector<mindspore::tensor::MSTensor *> LiteSession::GetInputs() {
 
 int LiteSession::RunGraph() {
   MS_EXCEPTION_IF_NULL(this->context_);
+  SetMaxWokerNum(context_->threadNum);
   Executor executor;
   return executor.Run(this->inputs, this->outputs, this->kernels, this->context_->allocator.get());
 }

mindspore/lite/src/runtime/thread_pool.cc

@@ -201,7 +201,7 @@ bool LiteThreadBind::SetCPUBind(pthread_t threadId, cpu_set_t *cpuSet) {
 #if __ANDROID_API__ >= 21
   int ret = sched_setaffinity(pthread_gettid_np(threadId), sizeof(cpu_set_t), cpuSet);
   if (ret != 0) {
-    MS_LOG(ERROR) << "bind thread %ld to cpu failed.ERROR %d", threadId, ret;
+    MS_LOG(ERROR) << "bind thread " << threadId << "to cpu failed.ERROR " << ret;
   }
 #endif
 #else