Don't run strong mode vm tests on simdbc64 until we figure out why it's acting architecture specific.

Bug:
Change-Id: Iacc78a249662c2b547ea9fe9347c09834e6277ac
Reviewed-on: https://dart-review.googlesource.com/30700
Reviewed-by: Emily Fortuna <efortuna@google.com>
Commit-Queue: Emily Fortuna <efortuna@google.com>
diff --git a/tests/standalone_2/standalone_2.status b/tests/standalone_2/standalone_2.status
index c92612e..a28eedf 100644
--- a/tests/standalone_2/standalone_2.status
+++ b/tests/standalone_2/standalone_2.status
@@ -58,6 +58,9 @@
 [ !$strong ]
 float_array_static_test: MissingCompileTimeError
 
+[ $arch == simdbc64 && $strong && ($compiler == dartk || $compiler == dartkp) ]
+io/*: Skip # Issue 31695
+
 [ $builder_tag == swarming && $system == macos ]
 io/*: Skip # Issue 30618