Fix parsing of --gtest_list_tests output.

test/heap-unittests/testcfg.py

Index: test/heap-unittests/testcfg.py
diff --git a/test/heap-unittests/testcfg.py b/test/heap-unittests/testcfg.py
index 7c80a75ea2f82a23e62813b143104d96aecd4911..ffa4b59de5bf792decbdb2fd5178486b26e28614 100644
--- a/test/heap-unittests/testcfg.py
+++ b/test/heap-unittests/testcfg.py
@@ -28,10 +28,11 @@ class HeapUnitTestsSuite(testsuite.TestSuite):
       return []
     tests = []
     test_case = ''
-    for test_desc in output.stdout.strip().split():
+    for line in output.stdout.splitlines():
+      test_desc = line.strip().split()[0]
       if test_desc.endswith('.'):
         test_case = test_desc
-      else:
+      elif test_case and test_desc:
         test = testcase.TestCase(self, test_case + test_desc, dependency=None)
         tests.append(test)
     tests.sort()