[test] Tolerate timeout on numfuzz with combined tests

A timeout result of randomly combined tests is not a useful indicator.
Therefore we ignore those now. This also prevents timeouts from being
re-run.

TBR=sergiyb@chromium.org
NOTRY=true

Bug: v8:6917
Change-Id: I8e5eb93e2f13067ca5270fb152c3dc1eda1bb3c2
Reviewed-on: https://chromium-review.googlesource.com/888559Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#50879}

test/mjsunit/testcfg.py

@@ -177,8 +177,8 @@ class CombinedTest(testcase.TestCase):
     self._tests = tests
 
   def _prepare_outcomes(self, force_update=True):
-    self._statusfile_outcomes = outproc.OUTCOMES_PASS
-    self.expected_outcomes = outproc.OUTCOMES_PASS
+    self._statusfile_outcomes = outproc.OUTCOMES_PASS_OR_TIMEOUT
+    self.expected_outcomes = outproc.OUTCOMES_PASS_OR_TIMEOUT
 
   def _get_shell_with_flags(self, ctx):
     """In addition to standard set of shell flags it appends:

tools/testrunner/outproc/base.py

@@ -13,6 +13,9 @@ from ..testproc.result import Result
 OUTCOMES_PASS = [statusfile.PASS]
 OUTCOMES_FAIL = [statusfile.FAIL]
 
+# We tolerate timeout with combined tests.
+OUTCOMES_PASS_OR_TIMEOUT = [statusfile.PASS, statusfile.TIMEOUT]
+
 
 class BaseOutProc(object):
   def process(self, output, reduction=None):