Introduce a parameter to skip slow tests when running with a simulator.

test/cctest/cctest.status

Index: test/cctest/cctest.status
diff --git a/test/cctest/cctest.status b/test/cctest/cctest.status
index 2ffa390913aa6af6d1b6d6e347cf1dba49254fba..de10e8bdc2d0ca33c98f21f835f5380c75deb04b 100644
--- a/test/cctest/cctest.status
+++ b/test/cctest/cctest.status
@@ -59,6 +59,24 @@ test-mark-compact/BootUpMemoryUse: PASS, PASS || FAIL if $mode == debug
 
 test-api/Bug618: PASS
 
+[ $arch == a64 && $simulator_run == True ]
+
+# Pass but take too long with the simulator.
+test-api/ExternalArrays: PASS || TIMEOUT
+test-api/Threading1: SKIP
+
+[ $arch == a64 && $mode == debug && $simulator_run == True ]
+
+# Pass but take too long with the simulator in debug mode.
+test-api/ExternalDoubleArray: SKIP
+test-api/ExternalFloat32Array: SKIP
+test-api/ExternalFloat64Array: SKIP
+test-api/ExternalFloatArray: SKIP
+test-api/Float32Array: SKIP
+test-api/Float64Array: SKIP
+test-debug/DebugBreakLoop: SKIP
+
+
 ##############################################################################
 [ $arch == arm ]