Merge pull request #12552 from stoudenmire/carousel-icon-classname-fix

Fixes two typos in carousel.less

less/carousel.less

@@ -206,8 +206,8 @@
 
   // Scale up the controls a smidge
   .carousel-control {
-    .glyphicons-chevron-left,
-    .glyphicons-chevron-right,
+    .glyphicon-chevron-left,
+    .glyphicon-chevron-right,
     .icon-prev,
     .icon-next {
       width: 30px;