!7349 add train ut to CI

Merge pull request !7349 from lz/master

mindspore/lite/test/run_train_ut.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+cd ./ut/src/runtime/kernel/arm || exit 1
+../../../../../../build/test/lite-test --gtest_filter=NetworkTest.efficient_net
+../../../../../../build/test/lite-test --gtest_filter=NetworkTest.tuning_layer
+../../../../../../build/test/lite-test --gtest_filter=NetworkTest.lenetnet

mindspore/lite/test/runtest.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+cd ./mindspore/lite/test/ || exit 1
+if [ $1 == train ]; then
+    echo 'run train ut tests'
+    ./run_train_ut.sh
+fi