MIPS: Fix build of unitttests in debug mode

Our toolchain fails to link unittests without this change.

Change-Id: I48cc61f45fe5d533ed207f987371893caf54a919
Reviewed-on: https://chromium-review.googlesource.com/c/1340293Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Commit-Queue: Ivica Bogosavljevic <ibogosavljevic@wavecomp.com>
Cr-Commit-Position: refs/heads/master@{#57634}

test/unittests/base/logging-unittest.cc

@@ -65,7 +65,7 @@ TEST(LoggingTest, CompareSignedMismatch) {
 
 TEST(LoggingTest, CompareAgainstStaticConstPointer) {
   // These used to produce link errors before http://crrev.com/2524093002.
-  CHECK_FAIL(EQ, v8::internal::Smi::kZero, v8::internal::Smi::FromInt(17));
+  CHECK_FAIL(EQ, v8::internal::Smi::zero(), v8::internal::Smi::FromInt(17));
   CHECK_SUCCEED(GT, 0, v8::internal::Smi::kMinValue);
 }