Update lib.status to only contain the things that are needed.

tests/lib/lib.status

Index: tests/lib/lib.status
diff --git a/tests/lib/lib.status b/tests/lib/lib.status
index ea363fcf8671d67f67ba7a745146f36e8aa26984..c0dc809449354dae26ae2440edb6c48884c7f12c 100644
--- a/tests/lib/lib.status
+++ b/tests/lib/lib.status
@@ -2,15 +2,8 @@
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
-
-[ $compiler == dartc || $compiler == frog ]
-*: Skip
-
-[ $arch == arm ]
-*: Skip
-
-[ $arch == simarm ]
-*: Skip
+[ $compiler == frog ]
+crypto/*: Skip
 
 [ $compiler == dart2js && $checked ]
 # numbers typed 'int' are too big to fit in a JS int.