chore(travis): print grunt exit code for debugging

Author: IgorMinar

travis_build.sh

@@ -17,5 +17,10 @@ export SAUCE_ACCESS_KEY=`echo $SAUCE_ACCESS_KEY | rev`
 ./lib/sauce/sauce_connect_setup.sh
 npm install -g grunt-cli
 grunt ci-checks package
+
+echo ">>> grunt exited with code: $?"
+echo ""
+echo ""
+
 ./lib/sauce/sauce_connect_block.sh
-grunt parallel:travis --reporters dots --browsers SL_Chrome
+grunt parallel:travis --reporters dots --browsers SL_Chrome