Add missing break

In ''int execute_tests( int argc , const char ** argv )'' function,
switch case is missing break statement.

Signed-off-by: Tuvshinzaya Erdenekhuu <tuvshinzaya.erdenekhuu@arm.com>
diff --git a/tests/suites/host_test.function b/tests/suites/host_test.function
index b9ea3d6..bb06822 100644
--- a/tests/suites/host_test.function
+++ b/tests/suites/host_test.function
@@ -590,6 +590,7 @@
              */
             test_files = &argv[ arg_index ];
             testfile_count = argc - arg_index;
+            break;
         }
 
         arg_index++;