替换rotate content部分

style/components/menu.less

@@ -126,7 +126,7 @@
       text-rendering: auto;
       position: absolute;
       transition: transform .3s ease;
-      content: "\e603";
+      content: "\e600";
       right: 16px;
       transform: scale(0.75);
     }

style/components/select.less

@@ -275,10 +275,8 @@
 
   &-open {
     .@{select-prefix-cls}-arrow {
-      .ie-rotate(2);
-      -ms-transform: rotate(180deg);
       &:before {
-        .rotate(180deg);
+        content: "\e602";
       }
     }
     .@{select-prefix-cls}-selection {