Create evolve.sh for infinite hyp evolution

utils/evolve.sh

+#!/bin/bash
+# Hyperparameter evolution commands (avoids CUDA memory leakage issues)
+# Replaces train.py python generations 'for' loop with a bash 'for' loop
+
+# Start on 4-GPU machine
+#for i in 0 1 2 3; do
+#  t=ultralytics/yolov5:test && sudo docker pull $t && sudo docker run -d --ipc=host --gpus all -v "$(pwd)"/VOC:/usr/src/VOC $t bash utils/evolve.sh $i
+#  sleep 60 # avoid simultaneous evolve.txt read/write
+#done
+
+# Hyperparameter evolution commands
+while true; do
+  python train.py --batch 64 --weights yolov5m.pt --data voc.yaml --img 512 --epochs 50 --evolve --bucket ult/voc --device $1
+done