Bug 1643058: Add a restart-after to avoid timeouts in the next test on win 7 debug. r=jib

Differential Revision: https://phabricator.services.mozilla.com/D79532

testing/web-platform/meta/webrtc/RTCPeerConnection-setRemoteDescription-simulcast.https.html.ini

@@ -0,0 +1,4 @@
+[RTCPeerConnection-setRemoteDescription-simulcast.https.html]
+  restart-after:
+    if (os == "win") and debug and (bits == 32): bug 1641974
+