adding assertion to run_test.sh

run_test.sh

@@ -6,6 +6,7 @@ fatal() {
 }
 
 if [ -z "$BUILD_DIR" ] ; then fatal "env var BUILD_DIR is not defined"; fi
+if [ -z "$HCC_HOME" ] ; then fatal "env var HCC_HOME is not defined"; fi
 
 cd $BUILD_DIR
 ./run.sh