A64: Synchronize with r15814.

test/cctest/cctest.status

Index: test/cctest/cctest.status
diff --git a/test/cctest/cctest.status b/test/cctest/cctest.status
index de10e8bdc2d0ca33c98f21f835f5380c75deb04b..18c21626ad7bbe941b39b1a32868859269b8b4a4 100644
--- a/test/cctest/cctest.status
+++ b/test/cctest/cctest.status
@@ -47,6 +47,7 @@ test-log/EquivalenceOfLoggingAndTraversal: PASS || FAIL
 
 # We do not yet shrink weak maps after they have been emptied by the GC
 test-weakmaps/Shrinking: FAIL
+test-weaksets/WeakSet_Shrinking: FAIL
 
 # Deferred stack trace formatting is temporarily disabled.
 test-heap/ReleaseStackTraceData: PASS || FAIL
@@ -124,6 +125,12 @@ test-threads/ThreadJoinSelf: SKIP
 ##############################################################################
 [ $arch == nacl_ia32 || $arch == nacl_x64 ]
 
+# NaCl builds have problems with threaded tests since Pepper_28.
+# V8 Issue 2786
+test-api/Threading1: SKIP
+test-lockers/MultithreadedParallelIsolates: SKIP
+test-lockers/ExtensionsRegistration: SKIP
+
 # These tests fail as there is no /tmp directory in Native Client.
 test-log/LogAccessorCallbacks: SKIP
 test-log/LogCallbacks: SKIP