fixes #10073: add width: 100%; for ie10 and below to size svg.img-responsive correctly

dist/css/bootstrap.css

@@ -935,6 +935,7 @@ img {
 .carousel-inner > .item > img,
 .carousel-inner > .item > a > img {
   display: block;
+  width: 100% \9;
   max-width: 100%;
   height: auto;
 }
@@ -943,6 +944,7 @@ img {
 }
 .img-thumbnail {
   display: inline-block;
+  width: 100% \9;
   max-width: 100%;
   height: auto;
   padding: 4px;

less/mixins/image.less

@@ -8,6 +8,7 @@
 // Keep images from scaling beyond the width of their parents.
 .img-responsive(@display: block) {
   display: @display;
+  width: 100% \9; // Force IE10 and below to size SVG images correctly
   max-width: 100%; // Part 1: Set a maximum relative to the parent
   height: auto; // Part 2: Scale the height according to the width, otherwise you get stretching
 }