Modify test to check if @import stylesheet get applied in a alternate…

… stylesheet
servo · bors-servo · Jan 11, 2017 · Jan 7, 2017 · Jan 8, 2017 · Jan 11, 2017
commit 2bcefa6470f8c04ef2831e0fa75af8fe6ef01630
diff --git a/tests/wpt/web-platform-tests/html/semantics/links/linktypes/alternate-import.css b/tests/wpt/web-platform-tests/html/semantics/links/linktypes/alternate-import.css
@@ -0,0 +1,3 @@
+body {
+    background-color: black;
+}
diff --git a/tests/wpt/web-platform-tests/html/semantics/links/linktypes/alternate.css b/tests/wpt/web-platform-tests/html/semantics/links/linktypes/alternate.css
@@ -1,3 +1,5 @@
+@import url("alternate-import.css");
+
 div {
     background-color: red;
 }