Core: Bump timeouts to stabilize doc ready test

The "document ready when jQuery loaded asynchronously" test fails all the time
in iOS7 and sometimes in other browsers. Bumping the timeouts *might* help
these other browsers to be less flakey here.

(cherry-picked from 854d242db4)

test/data/core/dont_return.php

@@ -1,3 +1,3 @@
 <?php
-sleep(10000);
+sleep(100000);
 ?>

test/data/core/dynamic_ready.html

@@ -28,7 +28,7 @@
 		timeoutId = setTimeout(function () {
 			timeoutFired = true;
 			window.parent.iframeCallback( false );
-		}, 3000);
+		}, 10000);
 	});
 </script>
 </body>