add voxceleb1 dataset prepare process

examples/voxceleb/sv0/local/data.sh

+stage=-1
+stop_stage=100
+TARGET_DIR=${MAIN_ROOT}/dataset
+
+. utils/parse_options.sh || exit -1;
+
+src=$1
+mkdir -p data/{dev,test}
+if [ ${stage} -le -1 ] && [ ${stop_stage} -ge -1 ]; then
+    # download data, generate manifests
+    # create data/{dev,test} directory to store the manifest files
+    /home/users/xiongxinlei/.conda/envs/xxl_base/bin/python3 ${TARGET_DIR}/voxceleb/voxceleb1.py \
+    --manifest_prefix="data/manifest" \
+    --target_dir="${src}"
+
+    if [ $? -ne 0 ]; then
+        echo "Prepare Voxceleb failed. Terminated."
+        exit 1
+    fi
+    mv data/manifest.dev data/dev
+    mv data/voxceleb1.dev.meta data/dev
+
+    mv data/manifest.test data/test
+    mv data/voxceleb1.test.meta data/test
+fi
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examples/voxceleb/sv0/run.sh

+#!/bin/bash
+set -e
+
+stage=0
+voxceleb1_root=/mnt/dataset_12/sv/voxCeleb1_v2/
+
+if [ $stage -le 0 ]; then
+    echo "======================================================================================================"
+    echo "=========================== Stage 0: Prepare the VoxCeleb1 dataset ==================================="
+    echo "======================================================================================================"
+    # prepare the data elapsed about 20s
+    # the script will create the data/{dev,test}
+    local/data.sh ${voxceleb1_root}|| exit 1;
+fi

examples/voxceleb/sv0/utils

+../../../utils/
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