Camerad add errno logging, and continue on EINTR

selfdrive/camerad/cameras/camera_qcom.c

@@ -2117,7 +2117,8 @@ void cameras_run(DualCameraState *s) {
 
     int ret = poll(fds, ARRAYSIZE(fds), 1000);
     if (ret <= 0) {
-      LOGE("poll failed (%d)", ret);
+      if (errno == EINTR) continue;
+      LOGE("poll failed (%d - %d)", ret, errno);
       break;
     }
 

selfdrive/camerad/main.cc

@@ -605,7 +605,7 @@ void* visionserver_client_thread(void* arg) {
     int ret = zmq_poll(polls, num_polls, -1);
     if (ret < 0) {
       if (errno == EINTR) continue;
-      LOGE("poll failed (%d)", ret);
+      LOGE("poll failed (%d - %d)", ret, errno);
       break;
     }
     if (polls[0].revents) {