Increase acceptable boot up memory size in tests for parallel sweeper threads.

test/cctest/test-mark-compact.cc

Index: test/cctest/test-mark-compact.cc
diff --git a/test/cctest/test-mark-compact.cc b/test/cctest/test-mark-compact.cc
index d94c37e808ff8a72fa889b3e95e238353296a4f5..83e4197a7dc88c48509cd61c28bd6704bfcf3636 100644
--- a/test/cctest/test-mark-compact.cc
+++ b/test/cctest/test-mark-compact.cc
@@ -558,15 +558,15 @@ TEST(BootUpMemoryUse) {
     printf("delta: %" V8_PTR_PREFIX "d kB\n", delta / 1024);
     if (sizeof(initial_memory) == 8) {  // 64-bit.
       if (v8::internal::Snapshot::IsEnabled()) {
-        CHECK_LE(delta, 3700 * 1024);
+        CHECK_LE(delta, 4000 * 1024);
       } else {
-        CHECK_LE(delta, 4200 * 1024);
+        CHECK_LE(delta, 4500 * 1024);
       }
     } else {                            // 32-bit.
       if (v8::internal::Snapshot::IsEnabled()) {
-        CHECK_LE(delta, 2600 * 1024);
+        CHECK_LE(delta, 2900 * 1024);
       } else {
-        CHECK_LE(delta, 3100 * 1024);
+        CHECK_LE(delta, 3400 * 1024);
       }
     }
   }