Bug 1184826: P2. Update web-platform-tests expected data. r=karlt

testing/web-platform/meta/media-source/mediasource-is-type-supported.html.ini

@@ -43,7 +43,9 @@
       if (os == "win") and (version == "5.1.2600"): FAIL
 
   [Test valid MP4 type "audio/mp4;codecs="mp4a.67""]
-    expected: FAIL
+    expected:
+      if os == "linux": FAIL
+      if (os == "win") and (version == "5.1.2600"): FAIL
 
   [Test valid MP4 type "video/mp4;codecs="mp4a.40.2""]
     expected: