add a couple more @flaky tags

Author: etpinard

test/jasmine/tests/select_test.js

@@ -554,7 +554,7 @@ describe('@flaky Test select box and lasso in general:', function() {
     });
 });
 
-describe('Test select box and lasso per trace:', function() {
+describe('@flaky Test select box and lasso per trace:', function() {
     var gd;
 
     beforeEach(function() {

test/jasmine/tests/shapes_test.js

@@ -629,7 +629,7 @@ describe('Test shapes: a plot with shapes and an overlaid axis', function() {
     });
 });
 
-describe('Test shapes', function() {
+describe('@flaky Test shapes', function() {
     'use strict';
 
     var gd, data, layout, config;