Add mips64 port.

test/cctest/cctest.status

Index: test/cctest/cctest.status
diff --git a/test/cctest/cctest.status b/test/cctest/cctest.status
index 7820f15204d16957f82b8a7331fe86b0b52d89c0..7c30560ea32a1039187e7b4bdcac32730737059e 100644
--- a/test/cctest/cctest.status
+++ b/test/cctest/cctest.status
@@ -206,6 +206,22 @@
 }],  # 'arch == mipsel or arch == mips'
 
 ##############################################################################
+['arch == mips64el', {
+
+  # BUG(2657): Test sometimes times out on MIPS simulator.
+  'test-thread-termination/TerminateMultipleV8ThreadsDefaultIsolate': [PASS, TIMEOUT],
+
+  # BUG(v8:3154).
+  'test-heap/ReleaseOverReservedPages': [PASS, FAIL],
+
+  # BUG(1075): Unresolved crashes on MIPS also.
+  'test-serialize/Deserialize': [SKIP],
+  'test-serialize/DeserializeFromSecondSerializationAndRunScript2': [SKIP],
+  'test-serialize/DeserializeAndRunScript2': [SKIP],
+  'test-serialize/DeserializeFromSecondSerialization': [SKIP],
+}],  # 'arch == mips64el'
+
+##############################################################################
 ['arch == x87', {
 
   # TODO (weiliang): Enable below tests after fixing the double register