新增：菜单组件增加国际化语言支持；

src/theme/default/color.less

@@ -14,3 +14,17 @@
 @primary-8: color(~`colorPalette('@{primary}', 8) `);
 @primary-9: color(~`colorPalette('@{primary}', 9) `);
 @primary-10: color(~`colorPalette('@{primary}', 10) `);
+
+@gray-1: #ffffff;
+@gray-2: #fafafa;
+@gray-3: #f5f5f5;
+@gray-4: #f0f0f0;
+@gray-5: #d9d9d9;
+@gray-6: #bfbfbf;
+@gray-7: #8c8c8c;
+@gray-8: #595959;
+@gray-9: #434343;
+@gray-10: #262626;
+@gray-11: #1f1f1f;
+@gray-12: #141414;
+@gray-13: #000000;